Hair color ingredient that helps dyes bind to and penetrate hair strands, creating rich, lasting color results.
Formula
C9H12N2O4
Mol. Weight
212.20
CAS #
59820-63-2
Form
Liquid
See origin →
Functions
Hair Dyeing
Colors Hair
Traditional Use
A synthetic hair dye ingredient developed in the mid-20th century as part of advances in permanent hair coloring chemistry. Used to create red and brown hair color tones.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
No
EWG
4
CIR
Insufficient
Pregnancy
No
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
15%
0%21%
Reg. Limit
EU regulatory limit: 15%. 0 Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 235.