t-Butyl Alcohol

t-Butyl Alcohol molecular structure
molecular structure · PubChem
AKA: Tert-Butanol, Tert-Butyl alcohol, 2-Methylpropan-2-ol, 75-65-0, 2-Methyl-2-propanol, T-Butanol, 1, 1-Dimethylethanol, Trimethylcarbinol, T-Butyl hydroxide
Synthetic
Fragrance
Solvent
Not Clean
Tert-butanol is a tertiary alcohol alcohol that is isobutane substituted by a hydroxy group at position 2. It has a role as a human xenobiotic metabolite. It derives from a hydride of an isobutane.
Solubility greater than or equal to 100 mg/mL at 70 °F (NTP, 1992)
Formula
C4H10O
Mol. Weight
74.12
CAS #
75-65-0
Form
Liquid
State
Tert-butyl alcohol is a colorless oily liquid with a sharp alcohol odor. Floats and mixes with water. Produces irritating vapor. Freezing point is 78 °F. (USCG, 1999)
Functions
Denaturant
Perfuming
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Makes Alcohol Undrinkable
Adds Fragrance
Dissolves Ingredients
Reduces Inflammation
Locks In Moisture
Wound Healing
Adds pleasant scent
Dissolves other ingredients
Traditional Use
A synthetic solvent first synthesized in the early 20th century, used in cosmetics and personal care products as a denaturant and solvent for various cosmetic ingredients.
EWG
3
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
medical-approval
all-shades-safe
Moderate Irritant
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed4 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR