Basic Red 51
INCI: BASIC RED 51
CAS 77061-58-6 EC 278-601-4
2-[[4-(Dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
Limited Data
Insufficient safety data available. Consider enriching this ingredient.
Details
Description
2-[[4-(Dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
Purpose
Function
Hair dyeing (semi-permanent/direct cationic dye)
Profile
Properties
Silicone
Silicone free
Compliance
Regulatory Status
EU
Banned
Safety
POOR
US
Permitted
Absorptionlow
Sensitizationlow
MoSadequate
NOAEL10 mg/kg
ConcernModerate
Flags
eu_children_restrictedeu_cosing_listed
Verdict
Azo dye with potential reductive cleavage to dimethylaminoaniline; additional safety data was required before regulatory approval.
US Note
Not an FDA-approved color additive; coal tar hair dye exemption applies when used in hair dyes with required caution labeling
Assessment
Ratings
Reference