Is t-Butyl Methacrylate safe in cosmetics?
t-Butyl Methacrylate has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Moderate
Cosmetic Ingredient
t-Butyl Methacrylate
Also known as: BRN 1746394, 1,1-Dimethylethyl 2-methyl-2-propenoate, EINECS 209-548-7, NSC 20957, UNII-F9029V5818
INCI: T-BUTYL METHACRYLATE
t-Butyl Methacrylate (CAS 585-07-9) is a cosmetic cosmetic ingredient functioning as Film Former (nail products); monomer for polymer synthesis. NOAEL 60 mg/kg bw/day (cross-referenced against ToxValDB ECHA IUCLID); EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 585-07-9 →
Auto-generated CPSR Part A draft with source citations
Function
Film Former (nail products); monomer for polymer synthesis
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
tert-butyl 2-methylprop-2-enoate
InChIKey
SJMYWORNLPSJQO-UHFFFAOYSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
CIR reviewed methacrylate ester monomers — data were found insufficient for some members of the group; safety concerns flagged for nail product applications
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for t-Butyl Methacrylate.
Calculate MoS for your specific formulation with the MoS Calculator.
Pre-Calculated Safety Assessment
Pre-calculated NOAEL → SED → MoS audit trail for t-Butyl Methacrylate across SCCS product categories, with measured dermal absorption where available.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1,000 - 10,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Film former
Regulatory List Membership (1)
FDA Indirect Food Contact Additives
Expert Verdict
Expert safety assessment and concern-level summary for t-Butyl Methacrylate.
Regulatory Flags
potential-allergen
Known Synonyms
BRN 1746394
1,1-Dimethylethyl 2-methyl-2-propenoate
EINECS 209-548-7
NSC 20957
UNII-F9029V5818
Chemical Function
Film former
Regulatory Lists
Indirect additives food contact (10/2018)
Frequently Asked Questions
Is t-Butyl Methacrylate allowed in the EU?
t-Butyl Methacrylate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does t-Butyl Methacrylate do in cosmetics?
t-Butyl Methacrylate functions as: Film Former (nail products); monomer for polymer synthesis. It is classified as a cosmetic ingredient in our database. CAS number: 585-07-9.
Is t-Butyl Methacrylate used outside cosmetics?
t-Butyl Methacrylate also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check t-Butyl Methacrylate compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
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