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Moumoujus

SODIUM STEARETH-4 PHOSPHATE.

Valuable CAS 57829-61-5 / 87666-99-7 / SURFACTANT - EMULSIFYING

Sodium Steareth-4 Phosphate is a versatile functional ingredient primarily used as an emulsifying agent and surfactant in skincare formulations. It is crucial for creating stable product textures by effectively blending immiscible oil and water components into a uniform mixture.

Summary

Emulsifying Surfactant

Science

Mechanism of Action

This ingredient functions by reducing the interfacial tension between otherwise incompatible oil and water phases. This action allows for the stable dispersion of one phase within the other, forming consistent emulsions that maintain product integrity and a smooth texture over time.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 3 – 9
0 7 14

Stability

Sodium Steareth-4 Phosphate demonstrates excellent stability across a broad pH range, specifically between pH 3 and 9. This robust stability is instrumental for its role in blending oil and water components to achieve and maintain stable emulsion systems in various product types.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel deemed 'Steareth ingredients,' including Steareth-4, safe for cosmetic use when formulated to be non-irritating. A broader assessment of the alkyl phosphate family, to which Sodium Steareth-4 Phosphate belongs, also concluded safety under current practices. While the FDA permits related fatty alcohols as indirect food additives, formulators must ensure purification steps control potential trace impurities such as 1,4-dioxane.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Sodium Steareth-4 Phosphate is a valuable functional ingredient for formulation stability, crucial for creating consistent product textures, and is considered safe for cosmetic use when appropriately formulated.

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