Solubility less than 1 mg/mL at 68.9 °F (NTP, 1992)
Formula
C6H7N3O2
Mol. Weight
153.14
CAS #
5131-58-8
Form
Liquid
State
4-nitro-1,3-benzenediamine appears as orange prisms with blue luster or yellow crystalline solid. (NTP, 1992)
Functions
Hair Dyeing
Colors Hair
Traditional Use
A synthetic hair dye ingredient developed in the early 20th century. One of the key components in permanent hair coloring chemistry, designed to replace earlier plant-based colorants like indigo and henna.