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Moumoujus

QUATERNIUM-33.

Questionable CAS 72102-40-0 / 86221-07-0 / ANTISTATIC, HAIR CONDITIONING

QUATERNIUM-33 is a cationic compound that functions by forming ionic bonds with negatively charged surfaces, including both hair and skin. While primarily valued for its antistatic and conditioning properties in hair products, its mechanism involves neutralizing electrical charges to enhance surface smoothness and manageability.

Summary

antistatic hair conditioning

Science

Mechanism of Action

Operating as a cationic agent, QUATERNIUM-33 creates ionic bonds with negatively charged surfaces of hair and skin. This interaction effectively neutralizes electrical charges, thereby reducing static buildup and contributing to improved surface texture and feel.

Research

Clinical Evidence

Low 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
Insufficient data
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) has classified QUATERNIUM-33 with insufficient data regarding its safety profile. While generally deemed safe for cosmetic applications, the Environmental Working Group (EWG) identifies low-moderate concerns for allergies and immunotoxicity, alongside low concerns for neurotoxicity, endocrine disruption, developmental/reproductive toxicity, and ecotoxicology. Due to structural similarities with other quaternary ammonium compounds linked to potential asthmagenic effects, reproductive toxicity in animals, and irritation, a patch test is recommended prior to broad application, despite adverse reactions being uncommon. The FDA does not mandate pre-market approval for cosmetic ingredients, excluding color additives.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

QUATERNIUM-33 primarily offers antistatic and conditioning benefits for hair, presenting limited direct utility for precision skincare formulations with current data.

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