murphyt-Butyl Alcohol
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
The New Tendency Complete Set
Nécessaire
Black Tulip Facial Treatment
Bloom Effects
The New Tendency Duo
Nécessaire
The Body Essentials
Nécessaire
The Body Lotion 450 ml | Multi-Peptide
Nécessaire
The Body Lotion 70 ml | Multi-Peptide | Olibanum
Nécessaire
The Body Lotion 70 ml | Multi-Peptide | Santal
Nécessaire
The Body Wash 100 ml | Multi-Acid | Hinoki
Nécessaire
The Body Wash 100 ml | Multi-Mineral | Santal
Nécessaire
The Body Essentials
Nécessaire
The Body Essentials Mini
Nécessaire
Synthetic
Fragrance
Solvent
Not Clean
OriginDerived from propylene, a petroleum-based hydrocarbon and member of the alcohol chemical family. Synthesized through hydration of propylene via acid-catalyzed reaction or cumene process intermediates.
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)
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
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
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.
EWG
3
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not Phototoxic
CIR Panel statement found no phototoxicity in the CIR safety assessment (CIR 895)
Not a Sensitizer
2 studies / 2 not sensitizing / plus 3 case reports (CIR 143 and 895)
Eye Irritant in Testing
3 studies / 3 irritating / reactions moderate to severe (CIR 895)
Mixed Skin Irritation Results
4 studies / 2 mixed / 2 not irritating / reactions minimal to moderate / plus 3 case reports (CIR 143 and 341 and 895)
Dermal Absorption 1–1.5%
2 animal studies in the CIR safety assessment (CIR 895)
Concentration Guide
Leave-on0.003–0.91%
Rinse-off0.00014–0.16%
0%50%100%
CIR reported use · 2022 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR