2-Chloro-5-((2-hydroxy-1-naphthalenyl)azo)-4-sulfobenzoic acid, calcium sodium salt (2:1:2) 5850-80-6 Benzoic acid, 2-chloro-5-((2-hydroxy-1-naphthalenyl)azo)-4-sulfo-, calcium sodium salt (2:1:2) CI 15525 Calcium disodium bis(2-chloro-5-((2-hydroxy-1-naphthyl)azo)-4-sulphonatobenzoate) EINECS 227-456-5 Pigment red 68