Synonyms: 1,2-Propanediol,cyclic sulfite (8CI);Propylene sulfite (6CI,7CI);1,2-Propylene glycolsulfite;4-Methyl-2-oxo-1,3,2-dioxathiolane;4-Methyl-[1,3,2]dioxathiolane2-oxide;NSC 44145;NSC 525703;4-Methyl-1,3-dioxa-2-thia(IV)cyclopentan-2-one;Sulfurous acid, cyclic propylene ester;Sulfurous acid, cyclic ester with 1,2-propanediol;