Good Cosmetic Ingredient

Beta-Sitosteryl (Octadecene/MA) Copolymer

INCI: BETA-SITOSTERYL (OCTADECENE/MA) COPOLYMER

CAS Number
Not uniquely assigned; base polymer: Octadecene/MA Copolymer CAS 25266-02-8, esterified with β-sitosterol
Function
Film forming, light stabilizer, viscosity controlling
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes Permitted; no specific restriction. CIR has assessed octadecene/MA copolymer family.

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Limited standalone toxicological dossier available. Residual monomers, particularly maleic anhydride (respiratory and skin sensitizer), must be controlled to specification. Confirm monomer residual levels in Certificate of Analysis.

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Concern Level: Moderate

Regulatory Flags

potential-allergen

Frequently Asked Questions

Is Beta-Sitosteryl (Octadecene/MA) Copolymer safe in cosmetics?

Limited standalone toxicological dossier available. Residual monomers, particularly maleic anhydride (respiratory and skin sensitizer), must be controlled to specification. Confirm monomer residual levels in Certificate of Analysis. The EU classifies Beta-Sitosteryl (Octadecene/MA) Copolymer as "permitted". Safety rating: GOOD.

Is Beta-Sitosteryl (Octadecene/MA) Copolymer allowed in the EU?

Beta-Sitosteryl (Octadecene/MA) Copolymer EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Beta-Sitosteryl (Octadecene/MA) Copolymer do in cosmetics?

Beta-Sitosteryl (Octadecene/MA) Copolymer functions as: Film forming, light stabilizer, viscosity controlling. It is classified as a cosmetic ingredient in our database. CAS number: Not uniquely assigned; base polymer: Octadecene/MA Copolymer CAS 25266-02-8, esterified with β-sitosterol.

What is the Margin of Safety for Beta-Sitosteryl (Octadecene/MA) Copolymer?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

Compliance Tools

Check Beta-Sitosteryl (Octadecene/MA) Copolymer compliance across multiple jurisdictions:

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Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
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Substance Compliance
Check compliance across 55 jurisdictions
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
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Heavy Metal Limits
Compare limits across jurisdictions

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