A white, translucent crystalline compound, Na2S 2O 3·5H 2O, used as a photographic fixing agent and as a bleach. Also called hypo1hyposulfite ,sodium hyposulfite硫代硫酸钠:一种白色的半透明的晶体状化合物,Na2S 2O 3·5H 2O,用作摄影冲洗固定剂和漂白剂 也作 hypo1hyposulfite,sodium hyposulfite