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Moumoujus

C30-38 OLEFIN.

Valuable CAS 64743-02-8 (generic) / NOT REPORTED

A high-performance hydrophobic polymer engineered to enhance the structural integrity and longevity of skincare films. It serves as a specialized performance excipient that optimizes the distribution of active ingredients while providing superior resistance to moisture and friction.

Summary

Film-forming agent SPF booster Anionic emulsifier Viscosity controller

Science

Mechanism of Action

This long-chain olefin functions by creating a uniform, breathable, and hydrophobic matrix on the skin's surface. In sun care applications, it thickens the product film to increase the optical path length of UV light, thereby maximizing the absorption efficiency of organic and inorganic filters. When neutralized, it further acts as an anionic emulsifier, improving pigment dispersion and ensuring high-tenacity skin adhesion.

Research

Clinical Evidence

High confidence
Effective range 0.5–2%
Optimal

2%

Key findings

  1. 01 A 2004 study in Cosmetics & Toiletries demonstrated that a 2% concentration significantly outperformed standard PVP/Eicosene copolymers in water resistance and SPF amplification.
  2. 02 Research published in 2013 identified a synergistic SPF-boosting effect at 1% when combined with other film-formers, allowing for a reduction in total UV filter concentration.
  3. 03 Industry data from 2006 establishes a 0.5-1.0% range as the clinical threshold for providing wash-off resistance in anhydrous and emulsion systems.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.5%
Red flag below
0.25%

As a functional polymer, C30-38 Olefin is rarely used for marketing claims. However, concentrations below 0.5% typically fail to provide the requisite film-forming density needed for measurable water resistance or SPF enhancement.

The Formula

Formulation

Solubility
Oil
Optimal pH 5.5 – 7.5
0 7 14

Stability

Inherently stable hydrophobic polymer; requires neutralization with a base such as Sodium Hydroxide for successful dispersion into the aqueous phase of O/W emulsions.

Synergies

  • PVP/Eicosene copolymer
  • UV filters (Organic and Inorganic)
  • Hydrophobic pigments

Conflicts

  • Cationic surfactants
  • Strong oxidizing agents
  • Polyvalent metal ions

Safety

Safety Profile

CIR Status
Safe as used
Max tested
2%
Pregnancy
Safe
Sensitization risk Low

Due to its high molecular weight, dermal absorption is negligible. It is classified as non-genotoxic and has a low hazard profile for leave-on applications.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A precision-engineered film-former essential for maximizing the efficacy of UV protection and the durability of long-wear topical formulations.

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