Glyceryl stearate & PEG 100 stearate

The blend Glyceryl Stearate & PEG-100 Stearate doesn’t have its own single CAS number since it’s a mixture of two ingredients. Instead, each component has its own CAS:

• Glyceryl Stearate → 31566-31-1

• PEG-100 Stearate → 9004-99-3

Glyceryl Stearate & PEG-100 Stearate is one of the most widely used emulsifier blends in personal care and cosmetics. It’s a self-emulsifying base that helps create stable oil-in-water (O/W) emulsions.

🔹 Form

• Appearance: White to off-white waxy flakes or pellets (solid at room temp)

• Odor: Mild, characteristic

• Solubility: Dispersible in hot water (requires heating ~60–70 °C for emulsification)

• Type: Non-ionic emulsifier blend

• INCI Name: Glyceryl Stearate (and) PEG-100 Stearate

🔹 Key Properties

• Primary O/W emulsifier: Used in creams, lotions, and conditioners

• Provides smooth, elegant texture and good skin feel

• Stabilizes emulsions (prevents oil and water separation)

• Compatible with anionic, cationic, and non-ionic ingredients

• Enhances spreadability and improves absorption

• Often combined with co-emulsifiers (like Cetyl/Stearyl Alcohol, Ceteareth-20) for added stability and viscosity

🔹 Applications in Personal Care & Cosmetics

✅ Skin Care

• Moisturizers, lotions, creams

• Anti-aging serums

• Sunscreens (helps disperse UV filters evenly)

• BB/CC creams and makeup foundations

✅ Hair Care

• Conditioners and masks (as an emulsifier + thickener)

• Leave-in creams and serums

✅ Other Personal Care

• Deodorant creams

• Baby care lotions and sunscreens

• Pharmaceutical creams and medicated ointments

🔹 Difference Between the Two Components

• Glyceryl Stearate: Derived from glycerin + stearic acid; natural, acts as a co-emulsifier and emollient.

• PEG-100 Stearate: Ethoxylated stearic acid ester; improves emulsification power, ensures stable O/W emulsions.

👉 Together, they form a balanced emulsifier system — Glyceryl Stearate gives richness & skin conditioning, while PEG-100 Stearate gives strong emulsification & stability.

🔹 Why Formulators Use It

• Reliable, versatile “backbone” emulsifier for creams and lotions

• Creates smooth, non-greasy textures

• Works well across a wide pH range (4–9)

• Compatible with silicones, natural oils, esters, and actives