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SLS (Sodium Lauryl Sulfate)
SLS (Sodium Lauryl Sulfate)
Key Functions: A high-performance anionic surfactant used for creating foam, emulsification, and removing dirt/oil in personal care formulations.
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Information About SLS (Sodium Lauryl Sulfate)
✅ Key Features
- Powerful foaming and cleansing surfactant
- Widely used in shampoos, soaps, body washes, and toothpaste
- Economical and effective in small amounts
- Compatible with other surfactants for custom blends
- Commonly used in both liquid and solid cleansing products
🔬 Description
Sodium Lauryl Sulfate (SLS) – High-Foam Surfactant for Cleansing & Personal Care
Sodium Lauryl Sulfate (SLS) is a widely-used anionic surfactant known for its ability to create rich foam and remove oils and debris from skin and hair. It is found in a variety of personal care and cleaning products including shampoos, body washes, facial cleansers, toothpaste, and detergents. Due to its strong cleansing power, SLS is especially valued in formulations where high foam and deep cleaning are required. It may be harsh on sensitive skin if used in high concentrations, so proper formulation is important for mildness.
📊 Technical Data
INCI Name: Sodium Lauryl Sulfate
CAS Number: 151-21-3
Solubility: Water-soluble
Add Phase: Heated water phase
pH Stability: 5.5 – 7.5
Processing Temperature: 45–60°C
Appearance: White/off-white powder or needles
Odor: Mild characteristic odor
Molecular Formula: C₁₂H₂₅NaO₄S
Molecular Weight: ~288.38 g/mol
Flash Point: Not applicable (non-flammable solid)
Density: ~0.3 g/cm³ (bulk)
Chemical Type: Anionic surfactant
Functional Groups: Sulfate ester, alkyl chain
Primary Cosmetic Uses: Shampoos, toothpaste, cleansers, body washes, soaps
🧪 Recommended Usage
- Usage Rate: 1%–15% depending on product type
- Recommended Additions: Cocamidopropyl Betaine (for mildness), Glycerin, Herbal Extracts
- Storage: Keep in a cool, dry place. Reseal container after use
💡 Pro Tip
For a gentler yet foamy formula, blend SLS with amphoteric surfactants like Cocamidopropyl Betaine and add Glycerin or Aloe Vera Extract to reduce dryness.
👩🔬 Skin Type Compatibility
✔️ Oily
✔️ Normal
❌ Not recommended for sensitive or dry skin without modification
🧴 Formulation Ideas
1.Basic Shampoo Formula
10% Sodium Lauryl Sulfate
5% Cocamidopropyl Betaine
2% Glycerin
1.5% Fragrance Oil
0.5% Preservative
81% Distilled Water
2. Foaming Face Wash
5% Sodium Lauryl Sulfate
4% Decyl Glucoside
2% Niacinamide
1% Aloe Vera Extract
0.5% Preservative
Balance with distilled water
💧 Cosmetic Suitability:
Serums☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
Creams & Lotions☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
Toners☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
Face Masks☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
Cleansers⭐⭐⭐⭐☆ – Good🟩🟩🟩🟩⬜
Hair Masks☆☆☆☆☆ – Not Suitable🟥⬜⬜⬜⬜
Deodorants☆☆☆☆☆ – Not Suitable🟥⬜⬜⬜⬜
Eye Creams☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
Shampoos⭐⭐⭐⭐⭐ – Excellent🟩🟩🟩🟩🟩
Soaps⭐⭐⭐⭐⭐ – Excellent🟩🟩🟩🟩🟩
Conditioners⭐☆☆☆☆ – Poor🟧⬜⬜⬜⬜
Lip Balms☆☆☆☆☆ – Not Suitable🟥⬜⬜⬜⬜
Body Butters☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
Ointments☆☆☆☆☆ – Not Applicable🟥⬜⬜⬜⬜
❓ FAQs
Q1: Is SLS safe for skin use?
A: Yes, when used in controlled amounts. Avoid high concentrations in leave-on products.
Q2: Can I use it for children’s products?
A: Not recommended for baby products due to potential for irritation.
Q3: Does SLS expire?
A: It has a long shelf life if stored properly, typically 2–3 years.
📂 Documentation
Upon request, we will provide.
Where Can You Safely Use SLS (Sodium Lauryl Sulfate)
Discover how SLS (Sodium Lauryl Sulfate) performs across different products — rated for safety, stability, and effectiveness.