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Moumoujus

AMMONIUM COCO-SULFATE.

Valuable CAS 90989-98-3 / CLEANSING, FOAMING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A coconut-derived anionic surfactant that effectively cleanses skin by reducing water's surface tension and forming micelles to capture oil-based impurities. While gentler than traditional sulfates, it maintains strong cleansing power with moderate irritation potential. Best suited for rinse-off formulations where thorough cleansing is prioritized over ultra-gentle care.

Summary

cleansing surfactant foaming emulsifying

Science

Mechanism of Action

Functions as an anionic surfactant by reducing surface tension between water and oils, enabling effective emulsification. Forms micelles that encapsulate lipophilic contaminants like sebum and environmental pollutants within their hydrophobic cores, allowing complete removal during rinsing while simultaneously creating foam through air entrapment.

Research

Clinical Evidence

Medium confidence
Effective range 1–15%
Optimal

4%

Key findings

  1. 01 HRIPT testing with 98 volunteers showed no sensitization at 4% concentration using related ammonium lauryl sulfate as surrogate
  2. 02 Clinical evaluation of related alkyl sulfates at 20% concentration demonstrated non-irritating properties in aqueous solutions

Transparency

Dusting Analysis

Not commonly dusted

Primary surfactant with established cleansing function, not typically used for marketing enhancement

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 7
0 7 14

Stability

Maintains optimal stability in slightly acidic to neutral pH ranges. Risk of ammonia gas release in alkaline conditions above pH 7. Supplied as liquid or solid forms with excellent water solubility.

Conflicts

  • Cationic surfactants - forms insoluble precipitates
  • Strongly alkaline ingredients - triggers ammonia release
  • Highly acidic components - causes sulfate ester hydrolysis

Safety

Safety Profile

CIR Status
Safe as used
Max tested
1%
Pregnancy
Safe
Sensitization risk Low

CIR Expert Panel approval for cosmetic use. Rinse-off products can utilize 1-15% concentrations, while leave-on applications should remain ≤1% to minimize irritation risk.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Low

Our Assessment

Verdict

Valuable

Effective coconut-derived surfactant offering strong cleansing performance with moderate irritation risk, ideal for oily and normal skin types in rinse-off formulations.

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