Polystearyl Methacrylate

CAS Number
25639-41-2 (most commonly referenced)
Function
Film former
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted for cosmetic use; CIR reviewed methacrylate-based polymers and found them safe as used

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

Residual free stearyl methacrylate monomer should be controlled in raw material specifications; methacrylate monomers are skin sensitizers. Polymer itself is inert.

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Concern Level: Low

Regulatory Flags

potential-allergen

Frequently Asked Questions

Is Polystearyl Methacrylate safe in cosmetics?

Residual free stearyl methacrylate monomer should be controlled in raw material specifications; methacrylate monomers are skin sensitizers. Polymer itself is inert. The EU classifies Polystearyl Methacrylate as "permitted". Safety rating: GOOD.

Is Polystearyl Methacrylate allowed in the EU?

Polystearyl Methacrylate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Polystearyl Methacrylate do in cosmetics?

Polystearyl Methacrylate functions as: Film former. It is classified as a cosmetic ingredient in our database. CAS number: 25639-41-2 (most commonly referenced).

What is the Margin of Safety for Polystearyl Methacrylate?

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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