2-Naphthalenecarboxylic acid, 4-[2-(5-chloro-4-methyl-2-sulfophenyl)diazenyl]-3-hydroxy-, calcium salt (1:1)
C.I. Pigment Red 48, calcium salt (1:1)
Calcium 4-[(5-chloro-4-methyl-2-sulfonatophenyl)diazenyl]-3-hydroxynaphthalene-2-carboxylate