Styrene/Butadiene Copolymer

INCI: STYRENE/BUTADIENE COPOLYMER

CAS Number
9003-55-8
Function
Opacifying
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted; also FDA-approved as direct food additive (butadiene-styrene rubber) . CIR: safe as used

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Critical concern: 1,3-butadiene monomer is an IARC Group 1 human carcinogen. Styrene monomer is IARC Group 2A . Residual monomer levels must be verified as <5 ppm. One of only 3 copolymers in this class containing butadiene monomer

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Concern Level: High

Regulatory Flags

fda_food_additive

Frequently Asked Questions

Is Styrene/Butadiene Copolymer safe in cosmetics?

Critical concern: 1,3-butadiene monomer is an IARC Group 1 human carcinogen. Styrene monomer is IARC Group 2A . Residual monomer levels must be verified as <5 ppm. One of only 3 copolymers in this class containing butadiene monomer The EU classifies Styrene/Butadiene Copolymer as "permitted". Safety rating: MODERATE.

Is Styrene/Butadiene Copolymer allowed in the EU?

Styrene/Butadiene Copolymer EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Styrene/Butadiene Copolymer do in cosmetics?

Styrene/Butadiene Copolymer functions as: Opacifying. It is classified as a cosmetic ingredient in our database. CAS number: 9003-55-8.

What is the Margin of Safety for Styrene/Butadiene 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.

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