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Isobutyl Methacrylate
AKA “97-86-9, Methacrylic acid, isobutyl ester, 2-Propenoic acid, 2-methyl-, 2-methylpropyl ester, Isobutyl 2-methyl-2-propenoate, 2-METHYLPROPYL METHACRYLATE, Isobutyl alpha-methacrylate, Isobutyl alpha-methylacrylate, Isobutylester kyseliny methakrylove, DTXSID3025461”
Ingredient
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Ingredient Facts
Isobutyl methacrylate
AKA: 97-86-9, Methacrylic acid, Isobutyl ester, 2-Propenoic acid, 2-methyl-, 2-methylpropyl ester, Isobutyl 2-methyl-2-propenoate, 2-METHYLPROPYL METHACRYLATE, Isobutyl alpha-methacrylate, Isobutyl alpha-methylacrylate, Isobutylester kyseliny methakrylove, DTXSID3025461
Ingredient · Film Forming · EWG: 5
Synthetic
Occlusive
Not Clean
2-Propenoic Acid, 2- Methyl-, 2-Methylpropyl Ester
Solubility Insoluble (<1mg/ml) (NTP, 1992)
Formula
C8H14O2
Mol. Weight
142.20
CAS #
97-86-9
Form
Powder
State
Isobutyl methacrylate is a colorless liquid with a flash point of 120 °F. When heated to high temperatures it may release acrid smoke and fumes. If it is subjected to heat for prolonged periods or bec
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Creates Protective Barrier
Traditional Use
A modern synthetic monomer developed for polymerization in the mid-20th century. Used in cosmetics as a film-forming ingredient in nail polishes and other decorative products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
EWG
5
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Final Report on the Safety Assessment of 2-Methyl-5-Hydroxyethylaminophenol
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Final Report on the Safety Assessment of Methacrylic Acid
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
2-Methyl-5-Hydroxyethylaminophenol
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
C8-22 Alkyl Acrylates/Methacrylic Acid Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Isobutyl Methacrylate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Methacrylic Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Methacrylic Acid/Styrene/VP Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
PEG/PPG-5/2 Methacrylate/Methacrylic Acid Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Polyisobutyl Methacrylate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
2-Methyl-1-Phenyl-2-Propanol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
2-Methyl-5-Hydroxyethylaminophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
C8-22 Alkyl Acrylates/Methacrylic Acid Crosspolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Isobutyl Methacrylate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Methacrylic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
2-Methyl-m-phenylenediamine
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
Methacrylic acid
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR