15782-03-3 2-Naphthalenecarboxylic acid, 4-((4-chloro-3-sulfophenyl)azo)-3-hydroxy-, strontium salt (1:1) EINECS 239-877-1 Strontium 4-((4-chloro-3-sulphonatophenyl)azo)-3-hydroxy-2-naphthoate (1:1)