Synonyms: sodium 1,4-dihydroxy-2-butene-2-sulphonate;1,4-Dihydroxy-2-butene-2-sulfonic acid sodium salt;2-Butene-1,4-diol-2-sulfonic acid, sodium salt;2-Butene-2-sulfonic acid, 1,4-dihydroxy-, monosodium salt;2-Butene-2-sulfonic acid, 1,4-dihydroxy-, sodium salt (1:1);Einecs 224-062-5