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Moumoujus

STEARAMIDOETHYL DIETHYLAMINE PHOSPHATE.

Avoid CAS 68133-34-6 / ANTISTATIC, HAIR CONDITIONING

Stearamidoethyl Diethylamine Phosphate functions as a cationic surfactant and emulsifier, contributing to the stability of cosmetic formulations. It also offers conditioning benefits for both hair and skin, though its use is associated with a notable risk of sensitization.

Summary

Antistatic Hair Conditioning Emulsifying Skin Conditioning

Science

Mechanism of Action

As a cationic surfactant, Stearamidoethyl Diethylamine Phosphate effectively reduces surface tension, facilitating the formation and stabilization of emulsions in cosmetic systems. Its inherent positive charge neutralizes static electricity, acting as an antistatic agent. Additionally, it serves as a conditioning agent, improving hair combability, softness, and shine, and enhancing the overall feel of the skin.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH ≤7
0 7 14

Stability

This ingredient maintains stability under non-alkaline conditions. The amine portion undergoes precipitation when exposed to alkaline environments.

Conflicts

  • Alkaline conditions (leads to amine precipitation)

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk High

The Cosmetic Ingredient Review (CIR) Expert Panel has not specifically evaluated STEARAMIDOETHYL DIETHYLAMINE PHOSPHATE. However, its parent compound, stearamidoethyl diethylamine, was identified as a moderate sensitizer in guinea pig studies, with 30% to 40% of subjects sensitized at concentrations between 0.5% and 1%. Reports of allergic contact dermatitis are associated with both the parent compound and the phosphate form. No specific SCCS opinion or FDA status for this exact ingredient was identified.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Medium
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Given the demonstrated moderate to high sensitization risk, including documented cases of allergic contact dermatitis, this ingredient is generally not recommended for precision skincare formulations despite its functional properties.

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References

Sources