The Index · Solvent / denaturant
T-Butyl Alcohol
t-Butyl Alcohol
Tertiary butyl alcohol solvent sometimes present from raw-material systems.
FunctionalFunctional ingredient, not graded for skin benefits
Sign in to save and follow
Tertiary butyl alcohol solvent sometimes present from raw-material systems.
What it does
Usually a residual/processing solvent at low levels in finished leave-ons.
The evidence
Functional ingredient (not graded for skin benefits): Solvent impurity/processing aid; not a skincare active. Credible chemical identity and cosmetic-use context come from CIR/SCCS/manufacturer INCI definitions and databases such as SpecialChem/PubChem[1].
How to use it
Expect this as a supporting INCI line item unless labeled as a featured active.
What it does in the formula
Functional ingredient — not graded for skin benefits
Tertiary butyl alcohol solvent sometimes present from raw-material systems.[1]
Safety & limits
Source and region, always
Sources · 2
Numbered as cited in the text
- [1]Cosmetic Ingredient Review. Alcohols context. CIR (2014)regulator
- [2]NIH PubChem. PubChem Compound Summary: tert-Butanol. PubChem (2024)other
Revision history
18 Sept 2026Drafted by botTheSkindex Desk