Basic Orange 31
INCI: BASIC ORANGE 31
CAS 97404-02-9 EC 306-764-4
2-((4-Aminophenyl)azo)-1,3-dimethyl-1H-imidazolium chloride
Limited Data
Insufficient safety data available. Consider enriching this ingredient.
Details
Description
2-((4-Aminophenyl)azo)-1,3-dimethyl-1H-imidazolium chloride
Purpose
Function
Hair Dyeing (semi-permanent / direct dye)
Profile
Properties
Silicone
Silicone free
Compliance
Regulatory Status
EU
Banned
Safety
POOR
US
Restricted
Absorptionmoderate
Sensitizationmoderate
MoSnot established
NOAEL60 mg/kg
ConcernModerate
Flags
eu_children_restrictedeu_cosing_listed
Verdict
Contains primary aromatic amine (aminophenyl group) requiring monitoring for free amine levels; restricted to non-oxidative systems only; must comply with purity specifications
US Note
Not an approved color additive; usable under coal-tar hair dye exemption with caution statement
Assessment
Ratings
Reference