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Moumoujus

STEARYL ETHYLHEXYLDIMONIUM METHOSULFATE.

Avoid / ANTISTATIC, HAIR CONDITIONING

Stearyl Ethylhexyldimonium Methosulfate is a quaternary ammonium salt, primarily recognized for its conditioning and antistatic properties. While frequently utilized in hair care products, its film-forming capabilities may also provide a conditioning benefit to the skin.

Summary

Antistatic agent Hair conditioning agent Skin conditioning agent

Science

Mechanism of Action

This ingredient functions as a cationic (positively charged) quaternary ammonium compound. Its positive charge facilitates interaction with negatively charged surfaces, such as hair, thereby neutralizing static electricity and imparting a smoother feel. This surface interaction and film-forming action can similarly contribute to a conditioning effect on the skin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Unknown
Optimal pH N/A
0 7 14

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) has not yet evaluated this ingredient. The Environmental Working Group (EWG) classifies Stearyl Ethylhexyldimonium Methosulfate as 'Unacceptable' for EWG VERIFIED products due to serious concerns, including potential developmental/reproductive toxicity, endocrine disruption, neurotoxicity (based on in vitro tests with related compounds), and non-reproductive organ system toxicity. EWG also notes limited evidence of respiratory toxicity or allergies. Conversely, SkinSAFE indicates it is free of the top common allergy-causing ingredients. It is listed in the FDA's Global Substance Registration System.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Due to significant potential safety concerns identified by the Environmental Working Group, including various forms of toxicity and endocrine disruption, this ingredient is not recommended for use in precision skincare formulations.

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