Emollient
DIISOBUTYL MALEATE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A diisobutyl ester of maleic acid. Reactive double bond and sensitization signals make it a poor fit for broad cosmetic use.
Diisobutyl maleate (CAS 14234-82-3) is the diisobutyl ester of maleic acid. Unlike saturated emollient esters, the maleate structure contains a reactive alpha,beta-unsaturated carbonyl (a Michael acceptor) that can react with skin proteins and nucleophiles. GHS notifications for this substance commonly include skin and eye irritation and skin sensitization (H317) classifications; it is better known as a plasticizer and reactive monomer than as a cosmetic emollient. There is no dedicated CIR monograph. When in doubt, the reactive-unsaturation plus sensitization signals push toward Moderate/Caution rather than green.
Function
Skin benefits
- Functional plasticizer/emollient role in specialty products
Known concerns
- Reactive Michael-acceptor structure
- Skin sensitization (H317) reports
- Thin cosmetic-specific safety review
- Primarily an industrial monomer
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related emollients
Check your shelf
Find DIISOBUTYL MALEATE in your products.
Scan any cosmetic product with LuxSense to see if it contains DIISOBUTYL MALEATE and get a full ingredient breakdown with safety scores.
This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.