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无水硫代硫酸钠

检测项目                          分析纯指标       
含量（Na2S2O3•5H2O）%               ≥99.0
PH(50g/L溶液，25℃):               6.0~7.5
澄清度试验                         合 格
水不溶物，%                        ≤0.005
氯化钠(Cl),%                       ≤0.02
硫酸盐及亚硫酸盐(以SO4计),%        ≤0.05
硫化物（S）,%                     ≤0.00025
总氮量 (N),%                      ≤0.005
镁 (Mg),%                         ≤0.001
钙（Ca）,%                        ≤0.003
铁 (Fe),%                         ≤0.0005
重金属（以Pb计）,%                ≤0. 0005