2-Naphthalenecarboxylic acid, 4-((4-chloro-5-ethyl-2-sulfophenyl)azo)-3-hydroxy-, calcium salt (1:1) 58067-05-3 C.I. Pigment Red 200, calcium salt Calcium 4-((4-chloro-5-ethyl-2-sulphonatophenyl)azo)-3-hydroxy-2-naphthoate EINECS 261-091-2