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LAURDIMONIUM HYDROXYPROPYL HYDROLYZED KERATIN.

Valuable / ANTISTATIC, HAIR CONDITIONING, SKIN CONDITIONING

Laurdimonium Hydroxypropyl Hydrolyzed Keratin is a quaternized form of hydrolyzed keratin, engineered with a positive charge for enhanced deposition on skin. It functions as a sophisticated skin conditioning agent, forming a protective film that actively preserves moisture, promotes a smooth and soft skin surface, and shields epithelial cells from environmental stressors.

Summary

Antistatic Hair Conditioning Skin Conditioning

Science

Mechanism of Action

This ingredient operates by leveraging its positive charge, which facilitates its deposition onto the skin's surface. Upon application, it creates a substantive protective film, which acts to seal in hydration, thereby maintaining skin moisture levels. This film also contributes to a smoother, softer skin texture and offers a degree of protection to epithelial cells against external damage or stress.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 An efficacy study utilizing 3% hydrolyzed keratin in a hand cream reported no adverse effects, indicating basic tolerability of the precursor ingredient.
  2. 02 Patch studies observed no sensitization up to 5% hydrolyzed keratin, providing foundational safety data for the base ingredient relevant to this derivative.

Transparency

Dusting Analysis

Not commonly dusted

The provided research does not indicate that Laurdimonium Hydroxypropyl Hydrolyzed Keratin is commonly dusted, nor does it specify dusting thresholds or red-flag percentages.

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 6
0 7 14

Stability

Manufacturer specifications indicate optimal stability between pH 4.0 and 6.0. Hydrolyzed keratin solutions have also been successfully used in hair treatments within a pH range of 5.5–6.0, further supporting its stability in mildly acidic to neutral conditions.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5%
Sensitization risk Low

The CIR Expert Panel concluded in 2016 that 'Keratin and Keratin-Derived Ingredients', encompassing hydrolyzed keratin (the foundation for Laurdimonium Hydroxypropyl Hydrolyzed Keratin), are considered safe for cosmetic use. Hydrolyzed keratin demonstrated non-irritating properties at 100% in in vitro tests and minimal to no irritation in rabbit studies (neat). While one isolated allergic reaction to a hair conditioner containing hydrolyzed keratin was reported, sensitization risk in patch studies up to 5% was low. Specific SCCS or FDA approval for this exact ingredient is not available, as FDA does not approve cosmetic ingredients, and SCCS has not issued an opinion.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

As a positively charged, skin-conditioning ingredient with a low irritation risk and established moisture-preserving capabilities, it is a valuable component for enhancing skin barrier function and hydration.

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