Synonyms: Benzenesulfonic acid, methyl-2,4(or 2,6)-dinitro-, sodium salt (1:1);Red water liquor;Benzenesulfonic acid, methyl-2,4(or 2,6)-dinitro-, sodium salt;Sodium methyl-2,4(or 2,6)-dinitrobenzenesulphonate;sodium 2-methyl-4,6-dinitrobenzenesulfonate