2-Nitro-4-aminodiphenylamine , with CAS number of 2784-89-6, can be called 2-Nitro-N(sup 1)-phenyl-1,4-benzenediamine ; 4-Amino-2-nitrodiphenylamine ; p-Phenylenediamine, 2-nitro-N(sup 1)-phenyl- . It is a green-brown crystal powder.