Isobutylene/MA Copolymer

INCI: ISOBUTYLENE/MA COPOLYMER

CAS Number
26426-80-2
Function
Film forming; viscosity controlling
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” no specific CFR restriction; structurally related copolymers reviewed by CIR

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Maleic anhydride monomer is a known skin and respiratory irritant; residual monomer levels must be certified low. When formulated to avoid irritation, the polymer itself is considered safe.

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Concern Level: Moderate

Frequently Asked Questions

Is Isobutylene/MA Copolymer safe in cosmetics?

Maleic anhydride monomer is a known skin and respiratory irritant; residual monomer levels must be certified low. When formulated to avoid irritation, the polymer itself is considered safe. The EU classifies Isobutylene/MA Copolymer as "restricted". Safety rating: GOOD.

Is Isobutylene/MA Copolymer allowed in the EU?

Isobutylene/MA Copolymer EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.

What does Isobutylene/MA Copolymer do in cosmetics?

Isobutylene/MA Copolymer functions as: Film forming; viscosity controlling. It is classified as a cosmetic ingredient in our database. CAS number: 26426-80-2.

What is the Margin of Safety for Isobutylene/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.

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