硫代硫酸铵

指标名称 

　　             液体指标                           固体指标 

　　含量          56~60%                          　 ≥98% 

　　外观        无色透明液体                        白色结晶　

　　亚硫酸铵      ≤1.0%                             ≤1.0%

　　碱度          0.3~1.5%                          ≤0.4%

不溶物(钙、镁沉淀)   ≤0.2%                           --- 

重金属(以铅计)       ≤0.001%                       ≤0.002%

铁(Fe)              ≤0.00025%                     ≤0.001%

硫化物(以硫计)      ≤0.0002%                      ≤0.0002% 

灼烧残渣            ≤0.1%                           ≤0.2%

比重 　　         1.310~1.335