2-Naphthalenecarboxylic acid, 3-hydroxy-4-((1-(sulfomethyl)-2-naphthalenyl)azo)-, strontium salt (1:1) 2-Naphthoic acid, 3-hydroxy-4-(((1-sulfomethyl)-2-naphthyl)azo)-, strontium salt 70703-34-3 EINECS 274-783-4 Strontium 3-hydroxy-4-((1-(sulphonatomethyl)-2-naphthyl)azo)-2-naphthoate