1,2-Propanediol, cyclic sulfite 1,2-Propylene glycol sulfite 1,3,2-Dioxathiolane, 4-methyl-, 2-oxide 1469-73-4 Cyclic propylene sulfite NSC44145 Propylene sulfite Propylene sulfite (C3H6O2)SO Sulfurous acid, cyclic ester with 1,2-propanediol Sulfurous acid, cyclic propylene ester WLN: T6OSOTJ BO