2-Naphthalenecarboxylic acid, 4-((4-chloro-5-ethyl-2-sulfophenyl)azo)-3-hydroxy-, disodium salt 32041-58-0 C.I. Pigment Red 200 Disodium 4-((4-chloro-5-ethyl-2-sulphonatophenyl)azo)-3-hydroxy-2-naphthoate EINECS 250-902-5