The molecule is a diamino-1,3,5-triazine with the amino groups situated at C-2 and C-4 and with a chloro group at C-6; the amino group at C-4 is substituted with a 2-sulfophenyl group. It is a diamino-1,3,5-triazine and an arenesulfonic acid. It is a conjugate acid of a 2-amino-6-chloro-4-(3-sulfonatoanilino)-1,3,5-triazine.
3-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]benzenesulfonic acid