Synonyms: Arseniousacid (H3AsO3), monoanhydride, As,As:As',As'-cyclic dipropylene ester (8CI);1,2-Propanediol, cyclic As,As:As',As'-diester with arsenious acid (H4As2O5)(8CI); 1,3,2-Dioxarsolane, 2,2'-oxybis[4-methyl-, bimol. monoanhydride,As,As:As',As'-cyclic dipropylene ester (8CI); Arsenous acid, monoanhydride,As,As:As',As'-cyclic bis(1-methyl-1,2-ethanediyl) ester