12237-58-0 2-Naphthalenecarboxylic acid, 3-hydroxy-4-((1-sulfo-2-naphthalenyl)azo)-, calcium salt 2-Naphthalenecarboxylic acid, 3-hydroxy-4-((1-sulfo-2-naphthalenyl)azo)-, calcium salt (1:1) 2-Naphthalenecarboxylic acid, 3-hydroxy-4-((1-sulfo-2-naphthalenyl)azo)-, calcium salt(1:1) 3-Hydroxy-4-((1-sulfo-2-naphthalenyl)azo)-2-naphthalenecarboxylic acid, calcium salt(1:1) 6417-83-0 74336-37-1 CCRIS 7075 CI 15880 CI 15880:1 (Ca salt) Calcium 3-hydroxy-4-((1-sulphonato-2-naphthyl)azo)-2-naphthoate D & C Red no. 34 D&C Red No. 34 EINECS 229-142-3