Corrosively medium for chemical production such as sodium hydrate,caustic soda,sulfuric acid,nitric acid,acetic acid,fatty acid.

化工生产品中性物料，如：碱、纯碱、浓稀、碳、醋等。

The preparation of zinc sulfate heptahydrate and copper sulfate pentahydrate from calcined zincblende was investigated.

用经高温煅后闪锌矿石与稀反应制备七水锌和五水。

Which indubitably indicate that the bismuthous sulfide can only dissolve in halogen acid except hydrofluoric acid, the mixed solution of dilute sulfuric acid and alkali halide.

结果表明化铋只能溶于氢卤（除氢氟外）、稀与碱金属卤化物混合液中，不能溶于稀中。