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Moumoujus

STEARDIMONIUM HYDROXYPROPYLTRIMONIUM CHORIDE.

Valuable / ANTISTATIC, HAIR CONDITIONING, SOLVENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

This cationic polymer serves as an effective skin conditioning agent, creating a protective film to significantly enhance moisture retention and promote a perceptibly smoother, softer skin texture. It actively contributes to product elegance and boosts epidermal hydration.

Summary

Antistatic Film forming Skin conditioning Viscosity controlling

Science

Mechanism of Action

Operating as a cationic polysaccharide, this ingredient employs its positively charged trimethylammonium/trimonium groups to bind electrostatically with the negatively charged surfaces of the skin. This interaction facilitates the formation of a protective, 'free-breathing' film that effectively minimizes transepidermal moisture loss, thereby amplifying hydration and imparting a supple, silky skin feel. It also aids in reducing static charges and can enhance the deposition of other active or hydrophobic agents onto the skin.

Research

Clinical Evidence

High confidence
Effective range 0.1–0.5%
Optimal

N/A

Key findings

  1. 01 Industry formulation guidelines indicate typical use concentrations between 0.10% and 0.50% for optimal conditioning benefits.
  2. 02 Safety assessments highlight the potential for irritation when concentrations exceed 1% for certain skin types.
  3. 03 The Cosmetic Ingredient Review (CIR) Expert Panel confirmed its safety for use in cosmetic formulations.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

The ingredient exhibits general stability across a wide pH range, though it is incompatible with strong acids and strong alkalis. For rapid and full hydration during formulation, an acidic pH between 5.0 and 5.5 is specifically recommended. It can also contribute to enhanced formulation viscosity and overall stability.

Conflicts

  • strong acids
  • strong alkalis

Safety

Safety Profile

CIR Status
Safe as used
Max tested
1%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that this ingredient is safe for use in cosmetics and personal care products, considering it non-irritating and non-sensitizing at typical concentrations. However, concentrations exceeding 1% may induce irritation, particularly in individuals with sensitive skin, necessitating advisable patch testing. The SCCS generally observes that low concentrations of quaternary ammonium compounds in cosmetics are either non-irritating or minimally irritating. Its precursor, Guar Gum, is affirmed as Generally Recognized As Safe (GRAS) by the FDA as a direct food substance.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A valuable cationic polymer, this ingredient effectively functions as a skin conditioning agent, delivering enhanced hydration, a silky skin feel, and improved product texture within established safe concentrations.

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