The chemical Sulfasalazine has a designated molecular formula of C18H14N4O5S and a molecular weight of 398.393 g/mol. Synonyms may include: S.A.S.-500, S.A.S. 500, 5-22-08-00433 (Beilstein Handbook Reference), W-T Sasp Oral, Accucol, Asulfidine, Azopyrin, Azopyrine, Azosulfidin, Azulfidine, Benzosulfa, BRN 0356241 (ChemID).