2-Naphthalenesulfonic acid, 5(or 8)-amino-8(or 5)-((2-chlorophenyl)azo)-, monosodium salt 67969-73-7 EINECS 267-978-0 Sodium 5(or 8)-amino-8(or 5)-((2-chlorophenyl)azo)naphthalene-2-sulphonate