2-Amino-4-nitro-N-(2-hydroxyethyl)aniline (CAS NO.56932-44-6), its Synonyms are 2-((2-Amino-4-nitrophenyl)amino)ethanol ; Ethanol, 2-((2-amino-4-nitrophenyl)amino)- ; HC Yellow no. 5 ; N1-(2-Hydroxyethyl)-4-nitro-o-phenylenediamine ; N'-(2-Hydroxyethyl)-4-nitro-ortho-phenylenediamine . It is yellow brown crystal powder.