• Provides stable oil-in-water emulsions
• Gives products a silky, luxurious texture
• Improves spreadability and enhances absorption
• Excellent skin compatibility and non-greasy feel
• Commonly used in SPF lotions, face creams, and baby products

GMS-AS – Creamy Emulsifier & Texture Enhancer for Skincare

 GMS-AS, also known as Glyceryl Stearate & PEG-100 Stearate, is a high-performance, non-ionic oil-in-water emulsifier used in skincare and cosmetic formulations. It is derived from vegetable fatty acids and ethylene oxide, offering stability, versatility, and a pleasant after-feel. GMS-AS forms elegant emulsions that are easily absorbed by the skin and leave a non-greasy, velvety touch, making it perfect for lotions, face creams, sunscreens, and moisturizers. It works well across a broad pH range and is compatible with most active ingredients.

INCI Name: Glyceryl Stearate & PEG-100 Stearate

CAS Number: 9004-99-3 / 31566-31-1

Solubility: Dispersible in water, oil-soluble

Add Phase: Oil phase (heat required)

pH Stability: 3.5 – 9.0

Processing Temperature: 65–75°C

Appearance: White, waxy flakes or pastilles

Odor: Faint fatty odor

Molecular Formula: C21H42O4 (Glyceryl Stearate portion)

Molecular Weight: ~358.56 g/mol (base component)

Flash Point: > 150°C

Density: ~0.95 g/cm³

Chemical Type: Non-ionic emulsifier

Functional Groups: Ester, ether

Primary Cosmetic Uses: Creams, lotions, sunscreens, baby care, serums

• Usage Rate: 1% – 10%
• Phase: Add to heated oil phase (60–75°C)
• Ideal For: Emulsions, Creams, Lotions, Baby Products, Sunscreens

🌿 For rich, non-greasy emulsions, pair GMS-AS with Cetyl Alcohol or Stearic Acid. For silky feel, combine with silicone alternatives or natural emollients like caprylic/capric triglycerides.

✔️ Suitable for all skin types

✔️ Gentle and non-comedogenic

✔️ Well-tolerated in baby care and sensitive formulas

1. Lightweight Facial Lotion

Use 3–5% GMS-AS with jojoba oil and hyaluronic acid to create a fast-absorbing hydrating lotion.

2. SPF Moisturizer Base

Combine 4% GMS-AS with zinc oxide and shea butter for a stable daily sunscreen.

3. Baby Cream

Include 2–3% in a mild emulsion with calendula oil and panthenol for sensitive skin.

4. Night Cream / Barrier Repair Cream

Use 5–6% in rich, nourishing night formulas with ceramides or squalane.

5. Body Butter Lotion

Blend 6% with cocoa butter and aloe vera gel for silky hydration without greasiness.

Serums
⭐⭐☆☆☆ – Fair
🟧🟧⬜⬜⬜ – Suitable in creamy or emulsion-based serums.



Creams & Lotions
⭐⭐⭐⭐⭐ – Excellent
🟩🟩🟩🟩🟩 – Ideal emulsifier and texture enhancer.



Toners
☆☆☆☆☆ – Not Suitable
🟥⬜⬜⬜⬜ – Not used in watery formulas.



Face Masks
⭐⭐⭐⭐☆ – Good
🟩🟩🟩🟩⬜ – Enhances spreadability and creaminess.



Cleansers
⭐⭐⭐⭐☆ – Good
🟩🟩🟩🟩⬜ – Useful in creamy cleansers and milks.



Hair Masks
⭐⭐⭐☆☆ – Moderate
🟧🟧🟧⬜⬜ – Adds creaminess to emulsified hair masks.



Deodorants
⭐⭐☆☆☆ – Fair
🟧🟧⬜⬜⬜ – Used in lotion-type deodorants.



Eye Creams
⭐⭐⭐⭐☆ – Good
🟩🟩🟩🟩⬜ – Gentle enough for delicate skin around the eyes.



Shampoos
⭐☆☆☆☆ – Poor
🟥⬜⬜⬜⬜ – Not applicable in surfactant systems.



Soaps
☆☆☆☆☆ – Not Suitable
🟥⬜⬜⬜⬜ – Not compatible with high-pH soap making.



Conditioners
⭐⭐☆☆☆ – Fair
🟧🟧⬜⬜⬜ – May assist in cream conditioner stabilization.



Lip Balms
⭐☆☆☆☆ – Poor
🟥⬜⬜⬜⬜ – Not suitable for anhydrous balms.



Body Butters
⭐⭐⭐⭐☆ – Good
🟩🟩🟩🟩⬜ – Adds softness and improves texture.



Ointments
⭐⭐☆☆☆ – Fair
🟧🟧⬜⬜⬜ – Can aid in cream-based medicated applications.

Q1: Is GMS-AS natural?

A1: It’s a semi-natural emulsifier, derived from natural fats but ethoxylated for better performance.

Q2: Can I use it as the only emulsifier?

A2: Yes — GMS-AS can form stable emulsions solo, but it pairs well with thickeners for enhanced texture.

Q3: Does it leave a greasy film?

A3: No — it provides a light, soft, velvety feel.

Q4: Is it suitable for baby products?

A4: Yes — it’s very mild, non-sensitizing, and used in baby lotions.

Q5: What’s the difference between GMS-SE and GMS-AS?

A5: GMS-SE is self-emulsifying and anionic (needs stabilizers). GMS-AS is non-ionic, more stable and universally compatible.