ISOBUTOXYPROPANOL
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
An alkoxypropanol solvent used in cosmetic and cleaning formulations as a coupling agent and fragrance fixative. The branched ether structure reduces toxicity compared to straight-chain analogues.
Isobutoxypropanol (2-methyl-1-isobutoxy-propan-2-ol or 1-isobutoxy-2-propanol) is an alkoxypropanol solvent used as a coupling agent, fixative, and solvent in cosmetic products. It is not specifically restricted under EU Annex III or IV of Regulation 1223/2009, though the branched structure gives it a more favourable toxicity profile than linear alkoxypropanols. It is used in rinse-off products at low concentrations.
Skin benefits
- Functions as a solvent improving formulation homogeneity
- May enhance fragrance longevity as a fixative
Known concerns
- Eye and skin irritation possible at high concentrations
- Limited data for long-term topical exposure
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.