4-Amino-2-Hydroxytoluene

AKA: 5-Amino-2-methylphenol, 5-Amino-o-cresol, 2835-95-2, 3-Hydroxy-4-methylaniline, Phenol, 6-Methyl-3-aminophenol, 2-methyl-5-aminophenol, 4-Amino-2-hydroxy-1-methylbenzene
Synthetic
Not Clean
an ingredient in oxidative hair coloring products; structure in first source
Solubility less than 1 mg/mL at 70 °F (NTP, 1992)
Formula
C7H9NO
Mol. Weight
123.15
CAS #
2835-95-2
Form
Powder
State
3-amino-6-methylphenol is a brown powder. (NTP, 1992)
Functions
Hair Dyeing
Boosts Collagen
Improves Elasticity
Moisturizing
Colors hair
Traditional Use
A synthetic hair dye precursor developed in the early-to-mid 20th century. Created to improve the safety and stability of permanent hair coloring formulations.
EWG
6
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
ewg-6
medical-approval
all-shades-safe
Phototoxicity Concern
Regulatory Status
USApermitted
EUpermitted
JAPANpermitted
CANADApermitted
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
The paper trail
🔬Peer-reviewed1 paper
⚖️Regulatory1 listing
🛡️Safety-assessed2 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR