2-Naphthalenesulfonic acid, 3-((5-hydroxy-2-((4-hydroxyphenyl)sulfonyl)phenyl)methyl)- 3-((5-Hydroxy-2-((4-hydroxyphenyl)sulphonyl)phenyl)methyl)naphthalene-2-sulphonic acid 68310-82-7 EINECS 269-735-4