C₁₂H₂₉NO₄S · ALS · CAS 2235-54-3 · EINECS 218-793-9
Saabun ka Asas (صابن کا اساس) — Pakistan’s premier coconut-derived anionic surfactant. Delivers 70–80% of SLS cleansing power at significantly reduced irritation — the backbone of every professional Pakistani shampoo formulation. Halal-certified, DRAP-permitted, and >90% biodegradable.
Saabun ka Asas (صابن کا اساس) — Foundation of Soap · Shampoo ki buniyad · Pakistan’s most-used shampoo surfactant
Shelf Life (sealed)
12–18 months at 15–30°C · Avoid freezing (irreversible phase separation) · Store away from direct sunlight
Introduction
Saabun ka Asas — The Surfactant Backbone
Ammonium Lauryl Sulfate (ALS) is the surfactant that quietly underpins a significant portion of Pakistan’s domestic personal care industry. Walk into any halwai, cosmetic shop, or wholesale chemical market from Lahore’s Akbari Mandi to Karachi’s Jodia Bazaar, and you will find this clear, slightly viscous liquid at the heart of local shampoo, body wash, and facial cleanser manufacturing. ALS belongs to the primary alkyl sulfate family — anionic surfactants synthesised from coconut or palm kernel-derived lauryl alcohol through SO₃ gas sulfation, followed by neutralisation with synthetic ammonia (the Haber-Bosch process). The result is a water-soluble ammonium salt that dissociates into the active lauryl sulfate anion and the ammonium counterion in aqueous solution. It is this ionic architecture that gives ALS its defining profile: exceptional foaming, effective degreasing, and — critically for the Pakistani consumer — a mildness advantage over its sodium-counterion cousin, Sodium Lauryl Sulfate (SLS).
The mildness difference between ALS and SLS is structural, not cosmetic. The ammonium counterion (NH₄⁺) is intrinsically milder than sodium (Na⁺) because the ammonium ion is slightly bulkier, reducing the penetration efficiency of the surfactant molecule into the skin barrier. Comparative dermatological studies consistently show that ALS-formulated shampoos produce 15–25% lower transepidermal water loss (TEWL) than SLS-equivalent formulas at the same active concentration. For Pakistani formulators serving a market where humid summers in Karachi (75–90% RH) and hot, dry winters in Lahore (10–25% RH) create genuinely different barrier-stress conditions, this mildness advantage translates into real consumer satisfaction data — particularly in the women’s, children’s, and sensitive-scalp segments. The ALS market in Pakistan is supplied primarily from Malaysia (Emery Oleochemicals), Indonesia (RSPO-certified suppliers), and China (Jiangsu Haian), with Bio Shop™ Pakistan sourcing from verified international suppliers backed by GC/MS certificates, RSPO documentation, and Halal compatibility attestation.
Bio Shop™ Pakistan — Sourcing Note
Bio Shop™ Pakistan stocks Ammonium Lauryl Sulfate at the industry-standard 70% active matter cosmetic grade — the specification used by professional shampoo manufacturers globally. Sourced from RSPO-certified Malaysian and Indonesian producers with full traceability documentation. Each batch supplied with active matter certificate, pH spec sheet, and Halal compatibility statement. Typical use: 4–18% ALS 70% in finished shampoo (equivalent to 2.8–12.6% active ALS). Minimum order 1kg; bulk pricing on 25kg and 200kg drums. Visit bioshop.pk/products/ammonium-lauryl-sulfate for current stock and pricing.
Molecular Identity
Chemical Identification
INCI NameAmmonium Lauryl Sulfate
CAS Number2235-54-3
EINECS / EC218-793-9
Molecular FormulaC₁₂H₂₉NO₄S · MW 283.43 g/mol · Ionic salt
Sourcing OriginMalaysia (Emery Oleochemicals) · Indonesia (RSPO-certified) · China (Jiangsu Haian) · All coconut/palm kernel-derived
Urdu / PakistanSaabun ka Asas (صابن کا اساس) — Foundation of Soap · Pakistan’s dominant shampoo surfactant backbone
Grade & Active Matter Profiles
Four Commercial Grades
ALS is commercially available in three active-matter concentrations plus an adulterated risk category that Pakistani formulators must guard against. Bio Shop™ Pakistan stocks the 70% cosmetic-grade standard — the professional specification used by shampoo manufacturers worldwide. Understanding grade differences is essential: using the wrong grade without adjusting formula quantities produces incorrect active levels and unpredictable viscosity and foam performance.
Professional Standard · Bio Shop™ Grade
Cosmetic Grade 70%
70% active matter · Standard cosmetic specification · Malaysia / Indonesia origin
"The professional standard for all shampoo, body wash, and facial cleanser manufacturing. Easiest to measure and handle; viscosity already partially developed. Bio Shop™ Pakistan primary stock. Full active-matter certificate & Halal compatibility statement with every batch. Typical use: 8–18% of this grade in finished shampoo."
Concentrate · Space-Efficient Shipping
High-Concentration 90%
90% active matter · Requires additional water in formula · Reduced transport cost
Active Matter
90%
Higher viscosity; dilution required · Use 78% as much as 70% grade
"Economical for large-scale Pakistani manufacturers shipping by container. Formula adjustment required: to match 10g of 70% grade, use 7.8g of 90% grade + compensate water. Handling requires more care: thicker consistency and higher concentrate means errors in weighing have greater impact on final formula performance."
Powder Form · Maximum Shelf Life
Powder Grade ~97%
~97% active ALS powder · Excellent stability · Slower dissolution
Active Matter
~97%
Requires complete dissolution before adding other ingredients
"Best choice for Pakistan’s interior markets where temperature stability during transport is a concern — powder grade does not phase-separate or freeze. Dissolve in warm water (40–50°C) before adding to formula. Produces identical performance to liquid grades when correctly dissolved. Use 72% as much powder as 70% liquid grade."
Density test <1.04 g/mL at 25°C = likely water-diluted
"Common adulterations in the Pakistani market: simple water dilution (active <50%), unannounced SLES substitution (produces different viscosity response to NaCl), or blending with cheaper co-surfactants without declaration. Test: measure density (pure 70% ALS: 1.045–1.065 g/mL at 25°C). Foam test: 1% solution should produce >100mm foam column in 30 seconds. Always request COA."
Dosage Science
Concentration Behaviour
ALS demonstrates a classic surfactant concentration-response profile, with performance gated by the Critical Micelle Concentration (CMC) of 0.18–0.25%. Below CMC, the molecule acts as a simple wetting agent — no foam, minimal cleaning. Above CMC, micelles form, foam develops, and degreasing efficiency activates. Pakistani formulators must think in terms of “active ALS” in the finished product — not the grade concentration — when targeting performance tiers. All percentages below refer to the finished product, calculated from 70% grade ALS (multiply by 0.7 to get active ALS). Viscosity response to NaCl provides a further performance dimension: ALS reaches maximum viscosity at approximately 1.5–2.0% NaCl in formula, then “salt breaks” above 3% — a key formulation control point for Pakistani shampoo manufacturers.
Below CMC — <0.25% active ALSWetting Agent Only
Below the critical micelle concentration; no foam, minimal degreasing, only surface wetting effect. Not useful for cleansing applications. Relevant only as trace bleed-through in rinse water from concentrated product
1–4% active ALS in productGentle Facial / Baby
Mild cleansing with soft foam; appropriate for baby shampoos (Nanha Sitara profile), gentle facial cleansers, and sensitive-scalp products. TEWL impact minimal. Pakistani mothers trust this tier for children under age 5. 70% grade: 1.5–6% in formula
4–8% active ALS in productStandard Daily Shampoo
The workhorse tier for Pakistani daily-wash shampoos: adequate degreasing for fine to normal hair, good consumer-acceptable foam, manageable scalp compatibility. Ideal paired with Coco Betaine (1:2 ratio) for enhanced mildness in the urban professional segment. 70% grade: 6–11% in formula
8–12% active ALS in productNormal to Oily Hair
Strong foam, efficient degreasing; well-suited for Lahore’s urban consumers who experience oily scalp due to heat-driven sebum overproduction in summer. Also appropriate for post-gym or daily-exercise hair-wash routines. Use NaCl at 1.5% for peak viscosity at this active level. 70% grade: 11–17% in formula
12–18% active ALS in productClarifying / Deep Cleanse
Intense degreasing; intended for clarifying or anti-build-up shampoos (weekly use only). At this level, scalp TEWL increases measurably — conditioning agents (Panthenol, Coco Betaine, Keratin) must be included to prevent dryness. Not recommended for daily use by any hair type. 70% grade: 17–26% in formula
Above 18% active in productIndustrial / Not for Retail
Harsh; significant scalp barrier disruption; irritation risk. Only appropriate for commercial carpet cleaners, industrial hand cleaners, and vehicle wash concentrates — not cosmetic personal care. At this range, the ammonium mildness advantage is overwhelmed by the sheer active concentration. Avoid for any retail personal care application
Mechanism & Performance
Functional Performance Profile
Mechanism 1 · Surfactancy
Micelle Formation & Dirt Capture
ALS works through a precise molecular mechanism: below the CMC (0.18–0.25%), individual ALS molecules adsorb at the water-air interface, reducing surface tension and enabling wetting. Above CMC, molecules aggregate into spherical micelles — their hydrophobic C12 tails pointing inward, hydrophilic sulfate head groups facing outward. These micelles physically encapsulate sebum, oils, styling product residues, and particulate soils within their hydrophobic core, suspending them in the rinse water. The C12 chain length is optimised: C10 (capric) produces weaker micelles; C14 (myristyl) creates excessive viscosity and reduced foam. This “Goldilocks” chain length makes lauryl sulfate the dominant cleansing surfactant globally. In Pakistan’s hard water (Lahore: 250–400 ppm CaCO₃ equivalent), calcium and magnesium ions partially neutralise the sulfate anion, reducing micelle efficiency — making Coco Betaine co-surfactant a practically important partner in the Lahore shampoo market.
Mechanism 2 · Consumer Experience
Foam Generation & Perception
ALS generates foam through the stabilisation of air–water interfaces: the surfactant molecule adsorbs at bubble surfaces, creating a lamellar film that resists coalescence and drainage. Standard testing (Ross-Miles method) confirms 140–180mm initial foam height for ALS at 0.25% — a metric that correlates strongly with consumer satisfaction in Pakistan’s shampoo market, where dense lather is culturally associated with cleansing efficacy. This association, while not chemically necessary for cleaning (enzymes clean without foam), is economically real: Pakistani consumer research consistently rates “acha jhag” (good lather) as the primary shampoo satisfaction driver. ALS foam is characteristically creamy and dense — the ammonium counterion produces a slightly finer bubble structure than sodium counterpart SLS, which is perceived as softer and more premium. This foam quality advantage, combined with the inherent mildness benefit, positions ALS as the preferred surfactant for mid-to-premium Pakistani personal care brands competing against imported products.
Mechanism 3 · Skin Science
South Asian Skin Compatibility
The mildness difference between ALS and SLS originates in counterion chemistry: the ammonium ion (NH₄⁺) is spatially bulkier than sodium (Na⁺), which reduces the efficiency of the ALS molecule in penetrating and disrupting the intercellular lipid matrix of the stratum corneum. Comparative patch-test studies consistently demonstrate 15–25% lower transepidermal water loss (TEWL) for ALS versus SLS-formulated shampoos at equivalent active concentrations. For South Asian skin — characteristically higher melanin density, slightly thicker stratum corneum compared to Northern European baselines, and often subject to the additional barrier stress of Lahore’s extreme summer heat or Karachi’s year-round humidity — this mildness advantage is clinically relevant, not merely marketing language. Formulators targeting Pakistan’s women’s segment, where daily hair washing is common in urban centres, and the children’s segment, where scalp barrier sensitivity is highest, should default to ALS over SLS for exactly this mechanistic reason. The ALS formula pH of 5.5–7.0 also aligns favourably with scalp pH (4.5–5.5), minimising disruption to the scalp acid mantle.
Mechanism 4 · Formulation Chemistry
Synergy & Formulation Architecture
ALS functions optimally within a dual-surfactant system. Paired with Coco Betaine (an amphoteric surfactant) at a 2:1 or 3:1 ALS:Betaine ratio, the anionic–amphoteric synergy produces three simultaneous benefits: enhanced mildness (betaine forms mixed micelles with ALS, reducing free monomer activity), improved foam quality (betaine stabilises ALS foam lamellae against collapse), and better conditioning feel (betaine reduces the net negative charge density on wet hair fibres, reducing post-wash frizz). NaCl (sodium chloride) acts as a viscosity builder through ionic screening: at 1.0–2.0% in formula, NaCl screens electrostatic repulsion between ALS micelles, allowing them to pack more densely and increase bulk viscosity to consumer-preferred ranges (3,000–8,000 cPs). Above 3%, the NaCl salt-break effect reduces viscosity — a formulation trap that many small Pakistani manufacturers fall into when “adding more salt to thicken” a formula that has already exceeded its salt optimum. Botanical actives (Neem, Amla, Henna) are chemically compatible with ALS at pH 5.5–7.0, enabling Pakistan’s highly valued heritage shampoo formulations without compromising surfactant performance.
Three production-ready formulas from the Bio Shop™ Pakistan reference document — exact weights, exact percentages, all verified to 100g totals. All ingredients available at bioshop.pk. Formula 1 is a heritage daily shampoo with desi botanical complex. Formula 2 is an anti-dandruff zinc pyrithione formula. Formula 3 is a tear-free children’s shampoo for the sensitive-scalp segment. Note: all water values have been corrected from the source document arithmetic errors — see amber notices below each formula.
⚠ Source document water was listed as 75.20g (total 101.04g). Corrected to 74.16g to achieve 100.00g. All other weights unchanged. — Heat water to 40°C; dissolve NaCl, Sodium Citrate, EDTA fully. Add ALS and Coco Betaine — stir gently (avoid excessive foam). Add Xanthan Gum pre-dispersed in glycerin. Cool to 35°C; add Panthenol, Rosehip Oil, Neem Oil, botanical extracts. Add Citric Acid to adjust pH to 5.5–6.0. Add Germall Plus, Sodium Benzoate, Fragrance last. Viscosity target: 4,000–7,000 cPs. Check NaCl response — if too thin, add NaCl 0.3g increments up to 2% total.
⚠ Source document water was listed as 72.40g (total 99.00g). Corrected to 73.40g to achieve 100.00g. All other weights unchanged. — ⚠⚠ REGULATORY: Ketoconazole is a pharmaceutical antifungal active; confirm DRAP licensing requirements before commercial sale in Pakistan. ZPT at 1.0% effective dandruff concentration (0.48g actual ZPT from 1.50g of 48% suspension). Add ZPT suspension to cooled base (<40°C) with gentle stirring; ZPT settles — agitate before filling. Tea Tree Oil: pre-solubilise in Polysorbate 20 (1:5 ratio) before adding to aqueous phase.
⚠ Source document water was listed as 76.50g (total 102.50g). Corrected to 74.00g to achieve 100.00g. All other weights unchanged. — Tear-free performance at ALS 2.50% / Betaine 3.00% ratio: low irritation confirmed by reduced Draize eye score profiles at this active level. pH target: 5.5–6.0 — use Sodium Citrate as buffer. Glycerin at 10% provides compensatory moisturisation for children’s scalp. Fragrance: choose IFRA-compliant baby-safe fragrance — avoid citrus terpenes, spice notes, and florals with geraniol above 0.01% in leave-on equivalent concentration.
Synergies
Classic Pairings
ALS is chemically compatible with amphoteric, nonionic, and cationic-free surfactant systems. The following pairings represent the most commercially validated combinations for Pakistani shampoo and body-wash formulation, confirmed from the reference document.
Ethoxylated Anionic · CAS 68585-34-2 · Sulfo-ethylene oxide
Mildness vs. ALS
Milder than ALS due to ethylene oxide spacers reducing protein binding; 2 EO units standard cosmetic grade; industry gold standard for mildness among anionics
Foam / Viscosity
Similar foam quality; better viscosity response to NaCl; cleaner-feeling rinse due to EO groups; standard Pakistani shampoo market workhorse
Cost / Availability
Readily available in Pakistan; slightly higher cost than ALS; Shampoo Base (Bio Shop™) is the convenient pre-built SLES-based starting point
Choose When
Maximum mildness required; standard adult shampoo; when SLES regulatory acceptance (EU export) preferred over ALS; or using Bio Shop™ Shampoo Base
Verdict: SLES is milder; ALS is cheaper and produces similar consumer-perceived foam. For export markets concerned about ethoxylation (1,4-dioxane trace) perception, ALS has a regulatory-cleanliness advantage. Available at bioshop.pk/products/sles-sodium-lauryl-ether-sulfate
SLS (Sodium Lauryl Sulfate)
Primary Alkyl Sulfate · CAS 151-21-3 · Sodium counterion
Mildness vs. ALS
Harsher than ALS; sodium counterion (Na⁺) has smaller ionic radius, greater penetration efficiency into stratum corneum; 15–25% higher TEWL in comparative studies
Foam / Viscosity
Stronger cleansing and foam; very similar foam height; lower viscosity response to NaCl than ALS; harder water compatibility slightly lower
Cost / Availability
Cheapest primary sulfate surfactant; widely available; frequently used in industrial and economy-segment personal care
Choose When
Industrial cleaning, economy shampoo segments, or clarifying formulas where maximum degreasing outweighs mildness. Avoid for children’s, sensitive-scalp, and premium shampoo formulations
Verdict: ALS is the professional upgrade from SLS — same C12 backbone, same foam quality, meaningfully better mildness. When positioning a product as “mild” or “for sensitive scalp”, ALS is the scientifically defensible choice over SLS. Available at bioshop.pk/products/sls-sodium-lauryl-sulfate
Coco Glucoside
Alkyl Polyglucosides (APG) · CAS 68515-73-1 · Nonionic
Mildness vs. ALS
Significantly milder than ALS — nonionic, no ionic charge interaction with skin proteins; suitable for eczema-prone, extremely sensitive scalp; TEWL impact negligible
Foam / Viscosity
Less dense foam than ALS; natural-feeling rinse; thinner viscosity; requires higher loading (12–20%) to match ALS cleansing at 8%; much higher cost-per-litre
Cost / Availability
2–4x cost of ALS; available at bioshop.pk; better biodegradability profile; enables “sulphate-free” label claim for premium natural-positioning brands
Verdict: Coco Glucoside targets a premium, niche-positioning segment willing to pay a premium for sulphate-free. ALS dominates the standard and professional-grade market. Both have a role; they serve different consumer value propositions. Available at bioshop.pk/products/coco-glucoside
Sodium Cocoyl Isethionate (SCI)
Acyl Isethionate · CAS 61789-32-0 · Mild anionic
Mildness vs. ALS
Comparable or milder than ALS; isethionate linkage less protein-interactive; better skin-feel; used in luxury syndet bars and premium solid shampoo bars
Foam / Viscosity
Creamy, luxurious foam texture; excellent for solid/bar formats; adds opacification to liquid shampoos; less standard viscosity control response to NaCl
Cost / Availability
Higher cost than ALS; primarily used at 5–30% blended with ALS or Coco Betaine; Bio Shop™ stocks as SCI powder pellets
Choose When
Premium liquid shampoo requiring ultra-creamy foam; solid shampoo bars and syndet bars; Gulf-export or international premium tier where cost-per-gram allows SCI inclusion at 5–15%
Verdict: SCI is the premium foam upgrade partner, not ALS replacement. An ALS 8% + SCI 5% blend delivers noticeably more luxurious foam texture than ALS alone, with acceptable mildness improvement and manageable cost uplift. Available at bioshop.pk/products/sodium-cocoyl-isethionate
Safety & Regulations
Regulatory & Safety Overview
Educational summary of publicly available regulatory data as of 2024. Always consult the current IFRA Standards, Safety Data Sheets, EU Cosmetics Regulation 1223/2009, relevant national regulatory databases, and your regulatory advisor before commercial formulation. This document does not constitute regulatory or safety advice.
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EU Cosmetics Regulation 1223/2009 — Permitted
Ammonium Lauryl Sulfate (CAS 2235-54-3) is not listed on Annex II (prohibited substances) or Annex III (restricted substances) of EU Cosmetics Regulation 1223/2009. It is a permitted cosmetic ingredient for use in rinse-off products (shampoos, body washes) and leave-on products (conditioners) throughout the EU and UK. Pakistani manufacturers exporting to the EU may use ALS without special labelling requirements. The EU Scientific Committee on Consumer Safety (SCCS) has not issued specific concentration restrictions for ALS in cosmetic products. Monitor EU regulatory updates as further science on surfactant mildness may influence future guidance.
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Pakistan DRAP & Halal — Fully Compliant
No restriction under Drug Regulatory Authority of Pakistan (DRAP) cosmetics guidelines. ALS is used freely in all personal care categories under Pakistani regulatory frameworks. Halal status is confirmed through the synthesis chain: lauryl alcohol is derived from coconut or palm kernel oil (plant-origin, RSPO-certified available); sulfation uses SO₃ gas (mineral, inorganic); neutralisation uses synthetic ammonia produced via the Haber-Bosch process from atmospheric nitrogen and natural gas — no animal involvement at any stage. No ethanol present in the process or final product. Bio Shop™ Pakistan can provide manufacturer Halal compatibility documentation on request for professional accounts.
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FDA CIR Safety Assessment — Approved
The Cosmetic Ingredient Review (CIR) Expert Panel in the USA reviewed Ammonium Lauryl Sulfate in 1983 and reaffirmed its safety in 2005, concluding it is safe as used in cosmetic formulations. Acute oral LD₅₀ in rats: 1,288 mg/kg (moderate acute toxicity by ingestion — relevant for safety data but not a concern at cosmetic use levels). Dermal sensitisation: not a sensitiser in standard patch-test protocols at typical use concentrations. Primary skin irritation: mild at concentrations below 12% active; potential irritant above 15% active in prolonged contact — relevant only for concentrated industrial products. At shampoo use concentrations (2–8% active ALS in finished product), the CIR assessment confirms safety for all consumer demographics including children.
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Eye Safety — Rinse-Off Application Safe
ALS has a mild ocular irritation potential at concentrated levels, which is substantially reduced in rinse-off shampoo formulations due to immediate dilution on contact with water. The Draize eye irritation test data for ALS at 1–5% shows mild, fully reversible irritation — within accepted parameters for rinse-off personal care products. At the ultra-low active levels used in tear-free children’s shampoos (1–3% active ALS), ocular irritation is negligible. Formulators developing baby or tear-free products should confirm eye safety with a combination approach: reduce ALS active to <3%, increase amphoteric co-surfactant (Coco Betaine) to ≥3%, and set final formula pH to 5.5–6.5 to minimise eye membranes exposure risk.
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Environmental — Biodegradable & Low-Risk
ALS achieves >90% biodegradation under OECD 301 test conditions — the “readily biodegradable” classification. The lauryl sulfate anion is metabolised efficiently by environmental microorganisms through β-oxidation of the fatty acid chain followed by desulfation. Aquatic toxicity (LC₅₀ for aquatic organisms) is low at realistic environmental concentrations after typical wastewater treatment plant removal. Unlike branched alkyl sulfates, the linear C12 chain of ALS undergoes complete mineralisation without persistent metabolite accumulation. Bio Shop™ Pakistan recommends diluting any concentrate waste in water before drain disposal, consistent with responsible chemical handling practices in Lahore and Karachi municipal systems.
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Handling Precautions & Formulation Limits
ALS 70% liquid is mildly alkaline at concentrate level — avoid eye contact and prolonged skin contact with undiluted material. Wash immediately with water if skin or eye contact occurs. Wear gloves and eye protection when handling bulk quantities. Key formulation limits: do not formulate above pH 8.5 (hydrolysis of sulfate ester accelerates above this); do not combine with cationic surfactants (e.g. BTMS, Cetrimonium Chloride) in the same phase — ionic incompatibility causes precipitation. Store bulk away from freezing temperatures (<0°C) — frozen ALS undergoes irreversible phase separation. Flash point >100°C — not flammable under standard handling conditions. In hard-water areas (Lahore: 250–400 ppm hardness), EDTA 4NA at 0.05% prevents calcium-sulfate salt precipitation.
Handling & Storage
Storing in Pakistan’s Climate
Temperature Range
15–30°C ideal; 10–35°C acceptable. Above 40°C may cause viscosity reduction and phase instability. Below 0°C causes irreversible phase separation — product cannot be recovered by warming
Container Type
HDPE drums (white or opaque, food/chemical grade) or stainless steel tanks for bulk. Avoid galvanised steel — zinc ions may react with sulfate. No glass — ALS 70% is viscous and adherent; impractical in glass at bulk scale
Freeze Risk
Critical: ALS 70% freezes at approximately 0–5°C and undergoes irreversible phase separation on thawing. Solid crystals reform and do not redissolve. Interior Pakistan winters (Lahore Dec–Feb) can approach this range — store in heated or insulated warehouse
Shelf Life (sealed)
12–18 months from manufacture date (sealed container). Once opened: 6–12 months if resealed promptly. Primary degradation risk: microbial contamination of partially used containers — reseal immediately after each use
Measuring Technique
ALS 70% is a viscous liquid at room temperature. Use a disposable plastic scoop or weigh directly into the mixing vessel. For small batches (<500g), a 0.01g balance is adequate. Rinse measuring equipment with water immediately after use to prevent hardening
Hard-Water Formulation
Add EDTA 4NA at 0.05–0.10% to all ALS-based formulas made with tap water (Lahore municipal water: 250–400 ppm hardness). EDTA chelates calcium and magnesium ions, preventing sulfate salt precipitation and maintaining foam performance
Lahore Summer (May–Aug)
Temperatures 38–45°C. At these temperatures, ALS viscosity drops significantly — product appears thinner but returns to normal on cooling. Do not add more NaCl to compensate for summer thinning — this will over-thicken the final product in winter. Store in air-conditioned warehouse below 30°C
Karachi Coastal Climate
High humidity (75–90% RH year-round) creates no direct risk to sealed ALS containers, but partially used open drums can absorb atmospheric moisture, slightly diluting active matter concentration. Reseal after each use. Monitor viscosity of open drums monthly — unexpected thinning indicates moisture ingress or microbial activity
⚠ Quality check — density test: Pure ALS 70% has a density of 1.045–1.065 g/mL at 25°C. Weigh 1.00 mL in a calibrated syringe — should read 1.045–1.065g. A reading below 1.040 strongly indicates water dilution or low-active supply. Foam test: prepare 1% solution (1g ALS 70% in 99g water); shake vigorously for 10 seconds in a capped measuring cylinder — foam column should reach >100mm and hold for >60 seconds. Always request Certificate of Analysis with active matter percentage and pH from any supplier.
FAQs
Frequently Asked Questions
Is Ammonium Lauryl Sulfate halal? What is its exact synthesis origin?+
Ammonium Lauryl Sulfate is halal. The complete synthesis chain: (1) Lauryl alcohol (1-dodecanol, C12) is produced by hydrogenation of lauric acid, which is obtained by fractionation of coconut oil or palm kernel oil triglycerides — both 100% plant-origin. RSPO-certified supply from Malaysia and Indonesia ensures no deforestation-linked palm is used. (2) Sulfation: lauryl alcohol reacts with sulfur trioxide (SO₃) gas in a falling-film reactor — SO₃ is a mineral inorganic reagent derived from sulfur dioxide oxidation; no animal involvement. (3) Neutralisation: the sulfuric acid half-ester is neutralised with synthetic ammonia (NH₃), which is produced via the Haber-Bosch process from atmospheric nitrogen (N₂) and natural gas (H₂) — entirely synthetic, no biological or animal source. (4) No ethanol, no fermentation by-products, no animal-derived enzymes at any production stage. (5) The final product is an aqueous ammonium salt solution — no prohibited substances present. Bio Shop™ Pakistan can provide manufacturer Halal compatibility documentation on request for professional accounts.
What is the difference between ALS and SLES — which should I use for my shampoo?+
The choice depends on your formulation objectives and product positioning. ALS (Ammonium Lauryl Sulfate) and SLES (Sodium Lauryl Ether Sulfate) are both anionic surfactants with similar cleansing and foaming performance, but they differ in two key ways. First, mildness: SLES contains ethylene oxide spacer groups (typically 2 EO units) between the alkyl chain and sulfate head, which reduce protein binding affinity and make SLES measurably milder than ALS. Both are milder than SLS. If maximum mildness is your priority, SLES or Bio Shop™’s pre-built Shampoo Base (SLES-based) is preferable. Second, label positioning: ALS does not contain ethylene oxide units, meaning it avoids the trace 1,4-dioxane concern that some natural-cosmetics certifiers associate with ethoxylated surfactants — giving ALS a “clean label” advantage in natural-positioning products. Choose ALS for: cost-optimised standard shampoos, clean-label or sulphate-but-ethoxylation-free positioning, and formulas where you want complete control over surfactant chemistry. Choose SLES or Shampoo Base for: maximum mildness, standard professional formulation, and the fastest path to a functional shampoo. Both are halal and DRAP-permitted.
How do I adjust viscosity using NaCl in an ALS shampoo formula?+
NaCl viscosity adjustment in ALS-based shampoos follows a characteristic bell-curve response: viscosity increases as NaCl is added, reaches a peak, then decreases rapidly — the “salt break”. The precise peak NaCl concentration depends on your active surfactant level, but for a standard ALS 8–10% plus Coco Betaine 3–4% formula, the viscosity peak occurs at approximately 1.5–2.0% NaCl (1.5–2.0g NaCl per 100g finished formula). Practical approach: (1) Make your complete formula without NaCl. (2) Measure viscosity. (3) Add NaCl in 0.3g increments to your 100g batch, stir for 5 minutes, measure viscosity at each point. (4) Stop when you reach your target viscosity (typically 4,000–8,000 cPs for a premium shampoo). (5) Record the total NaCl % and use that in your production formula. Common mistake: adding too much NaCl thinking “more = thicker” — once past the peak, adding more NaCl thins the formula irreversibly. If you have overshot, diluting with a small amount of surfactant concentrate is the recovery strategy. Note: Lahore’s hard tap water already contributes dissolved salts; always make test batches with the same water source as production to avoid viscosity surprises.
Which grade of ALS should I buy — 70% liquid, 90% liquid, or powder?+
For most Pakistani formulators, 70% cosmetic-grade liquid is the optimal choice for three reasons: ease of use (correct viscosity for direct weighing; dissolves completely in warm water without special handling), formula accuracy (standard industrial recipes are calibrated to 70% active; no grade conversion needed), and cost efficiency (70% includes the water already in your formula calculation). Use 90% liquid if you are a large manufacturer receiving container shipments and want to reduce freight costs per kg of active matter — but you must adjust all formula water values to compensate: for every 10g of 70% replaced by 7.78g of 90%, add 2.22g of extra water. Use ALS powder (~97%) if your operation is in an area where temperature control is difficult (interior Punjab, Khyber Pakhtunkhwa) and you need maximum stability against freezing during transport or storage — the powder form does not phase-separate. Dissolve in warm water (40–50°C) before use; use 7.22g powder to replace 10g of 70% liquid (add 2.78g extra water). Bio Shop™ Pakistan stocks the 70% grade as primary stock for professional formulators.
Does ALS perform differently in Lahore’s hard water versus Karachi’s soft coastal water?+
Yes — and this is a practically important formulation consideration that is frequently overlooked. Lahore’s municipal tap water has a hardness of approximately 250–400 ppm (calcium carbonate equivalent) — significantly harder than Karachi’s coastal water (typically 50–150 ppm). Hard water calcium and magnesium ions (Ca²⁺, Mg²⁺) compete with the ammonium counterion in ALS micelles, forming calcium lauryl sulfate and magnesium lauryl sulfate — which have reduced water solubility and decreased foaming efficiency. The practical consequences for Lahore formulation: (1) foam quality and density are measurably reduced when using tap water vs. distilled water in the same formula; (2) a white “scum” deposit can appear on bath surfaces if ALS concentration is high and water hardness is extreme; (3) always include EDTA 4NA at 0.05–0.10% in all Lahore-manufactured ALS formulas to chelate calcium and magnesium ions, restoring foam performance; (4) use distilled water (bioshop.pk/products/distilled-water-cosmetics-grade) for test batches. For Karachi producers using soft coastal water, this is less critical, though EDTA is still recommended as a best-practice formulation safeguard. When shipping Lahore-manufactured shampoo to Gulf markets where water is desalinated (extremely soft), expect viscosity to be slightly higher than in hard-water test conditions.
Can ALS be used in leave-on products or is it rinse-off only?+
ALS is primarily a rinse-off surfactant and should not be used in conventional leave-on products at functional concentrations. The reason is straightforward: at rinse-off use levels (5–15% ALS in shampoo, diluted further on application with water), scalp contact time is short (30–180 seconds) and any surfactant residue is physically removed during rinsing. In a leave-on product, prolonged contact of even trace ALS would increase TEWL over time and potentially disrupt the scalp acid mantle and microbiome. There are narrow exceptions: (1) at sub-CMC concentrations (below 0.25% active ALS), ALS acts only as a wetting agent without significant irritation potential; some scalp toners and hair sprays historically used trace anionic surfactants at these levels as deposition aids; (2) in micellar water formulations where ALS is at 0.5–1% active and the product is wiped off (not left on), it is acceptable. For formulations intended to remain on the hair or scalp — serums, leave-in conditioners, scalp treatments — use appropriate leave-on compatible actives (Panthenol, Niacinamide, Allantoin, Zinc PCA) rather than any sulfate surfactant. For Pakistan’s market, the distinction is commercially important: “sulphate-free” leave-on and co-wash products are a growing segment.
Which Pakistani consumer segments are best served by ALS-formulated shampoos?+
Four segments show the strongest alignment with ALS formulation. First, urban middle-market women (ages 18–45) in Lahore and Karachi who wash hair daily or every other day due to professional or social routines — this segment drives volume in the Pakistani shampoo market and needs a cost-effective, well-performing daily-wash formula where ALS delivers excellent value-for-money versus premium sulphate-free alternatives. Second, the oily-scalp segment, which is structurally large in Pakistan due to heat-driven sebum overproduction in summer: Lahore’s 38–45°C summers produce significantly elevated scalp sebum output, making adequate degreasing a performance priority — ALS at 8–12% active meets this need better than milder alternatives. Third, professional and semi-professional salon users who need a reliable bulk surfactant base for custom shampoo blending — where ALS’s predictable NaCl viscosity response and botanical compatibility makes it the preferred professional ingredient. Fourth, the heritage shampoo segment: Pakistan’s strong consumer preference for neem, amla, henna, and shikakai-formulated shampoos aligns well with ALS’s compatibility with these botanicals; ALS successfully carries the “desi ingredients, modern formula” positioning that is commercially valuable in Tier 2 and Tier 3 Pakistani cities and the Gulf expat market.
What Urdu brand names work for ALS shampoos? How does it perform in Pakistan’s heat?+
Recommended Urdu naming vocabulary for ALS-based shampoos draws on cleansing, radiance, and heritage themes. Single-word names: Noor (نور — radiance/light), Safai (صفائی — cleanliness), Taazgi (تازگی — freshness), Chamak (چمک — shine/sparkle). Compound names: Noor Shampoo (نور شیمپو — radiance shampoo, ideal for brightening/heritage positioning); Khushki Dur (خشکی دور — away with dandruff, for anti-dandruff ZPT formulas); Nanha Sitara (ننھا ستارہ — little star, perfect for children’s shampoo); Zulfen-e-Chamak (زلفین چمک — shining tresses, for women’s premium). Hot-weather performance: ALS performs excellently in Pakistan’s summer conditions. At Lahore’s 38–45°C ambient temperatures, the viscosity of the finished shampoo may decrease slightly due to thermal thinning — this is normal and reversible on cooling, but consumers may perceive it as “runny”. Compensate by formulating to slightly higher viscosity (6,000–9,000 cPs at 25°C, which drops to 4,000–6,000 cPs at summer ambient). The cleansing performance is actually enhanced in summer heat: elevated scalp temperature during shampooing accelerates micelle turnover, producing faster soil encapsulation and a noticeably “cleaner” sensation. This is a genuine selling point for Lahore’s summer market.
Everything on this page and substantially more — complete ALS synthesis mechanism with step-by-step SO₃ film sulfation and Haber-Bosch neutralisation diagrams, full comparative surfactant mildness data (TEWL measurements for ALS vs. SLS vs. SLES vs. APG), detailed CMC determination protocols and micelle geometry analysis, SCCS and CIR safety assessment data extracts, NaCl viscosity salt-curve data tables for five formulation variants, advanced Lahore hard-water formulation protocols with EDTA chelation chemistry, comprehensive Pakistani market segmentation by shampoo category and consumer segment, three complete product concepts (Noor Heritage Shampoo, Khushki Dur Anti-Dandruff, Nanha Sitara Children’s), full stability testing protocol for Pakistan climate conditions, and a complete guide to surfactant blend optimisation for domestic vs. Gulf export positioning — all compiled in one professional reference document.
