6-Hydroxyindole

6-Hydroxyindole molecular structure
molecular structure · PubChem
AKA: 2380-86-1, 1H-indol-6-ol, IMEXINE OBA, 417-020-4, 6-indolol
Synthetic
Not Clean
structure in first source
Formula
C8H7NO
Mol. Weight
133.15
CAS #
2380-86-1
Form
Powder
Functions
Hair Dyeing
Colors Hair
Traditional Use
Synthetic precursor compound developed for hair coloring applications in the 20th century, used in oxidative hair color systems as a color-generating intermediate.
EWG
7
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not an Irritant
ewg-7
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
🧂Conflict of interest.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026 · 🧪 = conflict
Data: PubChem · CosIng · EWG · CIR