Is Diisobutylene safe in cosmetics?
Diisobutylene has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Moderate
Cosmetic Ingredient
Diisobutylene
INCI: DIISOBUTYLENE
Diisobutylene (CAS 25167-70-8 (mixture of 2,4,4-trimethylpentene isomers)) is a cosmetic cosmetic ingredient functioning as Solvent and chemical intermediate; primarily used as a monomer in copolymers. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
Auto-generated CPSR Part A draft with source citations
CAS Number
25167-70-8 (mixture of 2,4,4-trimethylpentene isomers)
View industrial chemical safety profile →
Function
Solvent and chemical intermediate; primarily used as a monomer in copolymers such as Sodium MA/Diisobutylene Copolymer rather than as a standalone cosmetic ingredient.
Safety Rating
MODERATE
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Not specifically listed in 21 CFR for direct cosmetic use; no FDA prohibition.
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Diisobutylene.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Diisobutylene.
Frequently Asked Questions
Is Diisobutylene allowed in the EU?
Diisobutylene EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Diisobutylene do in cosmetics?
Diisobutylene functions as: Solvent and chemical intermediate; primarily used as a monomer in copolymers such as Sodium MA/Diisobutylene Copolymer rather than as a standalone cosmetic ingredient.. It is classified as a cosmetic ingredient in our database. CAS number: 25167-70-8 (mixture of 2,4,4-trimethylpentene isomers).
Compliance Tools
Check Diisobutylene compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
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Substance Compliance
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MoS Calculator
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Heavy Metal Limits
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