Photo grade Specification: Na2S2O3 · 5H2O: 99.0% min Water-insoluble : 0.01% max Density and phase: 1.667 g/ cm ³ , solid Solubility in water: Very Soluble Melting point: : 40-45  ° C Sulphide....
Zhengzhou Golden King Chemie Co., Ltd. was established in 1997. We are very close to the railway, enjoying a good transportation location. We have more than 200 staff members, and our enterprise....