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SODIUM COCOYL HYDROLYZED SILK.

Valuable / HAIR CONDITIONING, SKIN CONDITIONING, SURFACTANT - CLEANSING

SODIUM COCOYL HYDROLYZED SILK is a gentle, coconut-derived surfactant and hydrolyzed silk protein, designed to cleanse effectively while simultaneously conditioning the skin. It works by reducing surface tension and providing essential amino acids, contributing to a soft and supple skin feel.

Summary

Skin Conditioning Cleansing Agent Surfactant Hair Conditioning

Science

Mechanism of Action

This ingredient functions as an amphoteric surfactant, reducing the surface tension of cosmetic formulations to promote even product distribution, efficient cleansing, and rich foam production. As a hydrolyzed silk derivative, it delivers beneficial amino acids to the skin, acting as a humectant to draw and retain moisture in the stratum corneum. Furthermore, it contributes to forming a protective barrier on the skin's surface, helping to replenish lost proteins and maintain a plump, supple, and conditioned complexion.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Clinical human skin irritation and sensitization tests on aqueous hydrolyzed silk demonstrated its classification as a non-irritant and non-sensitizer at a 20% concentration.
  2. 02 Additional human skin irritation tests further confirmed the non-irritant nature of aqueous hydrolyzed silk at a 6.5% concentration.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 7
0 7 14

Stability

Formulations should maintain a pH range between 4.0 and 7.0 to ensure the stability of silk proteins and prevent degradation. As an amphoteric protein, it exhibits good compatibility with cationic, anionic, and non-ionic cosmetic ingredients.

Safety

Safety Profile

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

The CIR Expert Panel found hydrolyzed silk and similar silk protein ingredients safe for cosmetic use. Human skin tests for hydrolyzed silk showed non-irritant and non-sensitizer properties even at high concentrations (20%). Ocular irritation tests also indicated minimal to practically non-irritating effects. The maximum concentration of 5.0% is advised based on usage patterns of similar acylated silk polypeptides in various cleansing products.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

SODIUM COCOYL HYDROLYZED SILK is a valuable ingredient for its dual benefits as a gentle cleanser and a skin-conditioning agent, making it suitable for a wide range of formulations and skin types.

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