MIBK
MIBK
MIBK (methyl isobutyl ketone) is a synthetic chemical compound. It acts as a solvent and fragrance ingredient in cosmetic formulations.
PerfumingSolventProhibited in the EUSuspected CMR
Ingredient
Roles & functions
Perfuming — Adds a scent to the product or masks the odour of raw materials.
Solvent — Dissolves other ingredients to incorporate them into the formula.
Regulatory framework
What the authorities say
| Authority | Status |
|---|---|
| Commission européenne (CosIng, Règl. 1223/2009) | Interdit (Annexe II) — 4-methylpentan-2-one; isobutyl methyl ketone (MIBK) |
| Classification CLP harmonisée (ECHA, Annexe VI Règl. 1272/2008) — maj Fri, 07 Aug 2026 16:37:29 GMT | Cancérogène — suspecté |
| ECHA — endocrine disruptor (human health) | Not identified as an endocrine disruptor |
| ECHA — Candidate List (SVHC, REACH Art. 59) | Not on the Candidate List (SVHC) |
| European Commission (Reg. 1223/2009, Annex III) | No cosmetic allergen subject to mandatory labelling |
| European Commission (EU catalogue of nanomaterials, Reg. 1223/2009) | No referenced nanoform |
| European Commission — Annex II (Reg. 1223/2009) — maj Fri, 07 Aug 2026 16:37:22 GMT | Prohibited in cosmetics (Annex II) — 4-methylpentan-2-one; isobutyl methyl ketone (MIBK) — Annexe II, entrée 1689 |
Last verified :
🔒
This information is reported factually and with attribution (authorities and publications cited). It does not constitute medical advice, for your situation, ask a pharmacist or a healthcare professional for advice.
A question about this ingredient?
Lou answers you and looks at your products with you, in store.