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Moumoujus

AMMONIUM MYRETH SULFATE.

Valuable CAS 27731-61-9 / CLEANSING, FOAMING, SURFACTANT - CLEANSING

An ethoxylated anionic surfactant that provides effective cleansing and foaming properties in rinse-off formulations. Its ethoxylation structure makes it milder and more stable than traditional sulfates while maintaining strong dirt and oil removal capabilities. Concentration management is critical, as irritation potential increases significantly above 2%.

Summary

surfactant cleansing foaming

Science

Mechanism of Action

Functions as an anionic surfactant by reducing water's surface tension, enabling emulsification of oils and lipophilic debris. Forms micellar structures that encapsulate impurities for efficient removal during rinsing while stabilizing foam formation at the air-liquid interface.

Research

Clinical Evidence

High confidence
Effective range 0.1–50%
Optimal

1%

Key findings

  1. 01 Human patch testing demonstrated non-irritating properties below 1% concentration with irritation onset at 2% and above
  2. 02 Concentrations exceeding 10% produced moderate to intense skin irritation in clinical assessments

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
2%
Red flag below
10%

Rarely overfilled due to its primary role as a cleansing base ingredient with well-established concentration limits for safety

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 7
0 7 14

Stability

Demonstrates excellent stability in aqueous systems with enhanced mildness from ethoxylation. Can be viscosity-adjusted using electrolytes like sodium chloride.

Synergies

  • Sodium Chloride (thickening)
  • Other anionic surfactants

Conflicts

  • Cationic surfactants
  • Strongly acidic formulations
  • High polyvalent cation concentrations

Safety

Safety Profile

CIR Status
Safe as used
Max tested
50%
Pregnancy
Safe
Sensitization risk Moderate

Safe up to 50% in rinse-off products when properly formulated. Leave-on applications should remain below 1% to prevent cumulative irritation.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Effective cleansing surfactant suitable for normal to oily skin when used at appropriate concentrations below irritation thresholds.

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