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BUTENE.

Valuable CAS 106-98-9; 25167-67-3 / NOT REPORTED

A synthetic hydrocarbon polymer that excels as a film-forming agent and viscosity controller in cosmetic formulations. Particularly valued in color cosmetics and lip products for its ability to create glossy finishes while providing long-lasting wear and moisture protection.

viscosity controlling film forming occlusive agent pigment binder

Science

Forms an occlusive film on the skin's surface that prevents transepidermal water loss while acting as a binder to improve product cohesion. Its large molecular structure creates a protective barrier that enhances pigment adhesion and provides high-gloss shine in color cosmetics.


Research

High confidence
Effective range 3.1–95%
Optimal

20%

Key findings

  1. 01 Patch testing at 20% concentration in lipstick showed no irritation in 100 women (CIR, 2014)
  2. 02 Repeated insult patch tests at 3.1-50% produced minimal irritation or sensitization
  3. 03 High concentration use at 95% demonstrated safety without systemic toxicity

Transparency

Not commonly dusted

Well-established cosmetic ingredient with clear safety profile and specific functional benefits


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Exceptionally stable synthetic polymer resistant to oxidation and microbial contamination across wide temperature and pH ranges

Synergies

  • Oil-based ingredients
  • Pigments
  • Other film-formers

Conflicts

  • Water
  • Highly polar solvents

Safety

CIR Status
Safe as used
Max tested
95%
Pregnancy
Safe
Sensitization risk Low

Large molecular size prevents significant skin penetration; approved for mucous membrane contact and as indirect food additive


Your Skin

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

Our Assessment

Valuable

A reliable film-former with excellent safety data, particularly beneficial for dry and sensitive skin in color cosmetics and occlusive formulations.


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