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 4N（SP）   AR

GB/T　1284-77
项目Item　                                                         分析纯　　    化学纯
                                                                             (AR)                    (CP)
含量［Cd(NO3)2·4H2O］Assay,%                      ≥99.0               98.5

铜(Cu)Copper,%                                                 ≤0.001              0.003
锌(Zn)Zinc,%                                                       ≤0.002              0.005
铅(Pb)Lead,%                                                     ≤0.005              0.01
硫化铵不沉淀物(以硫酸盐计)Substances not
precipitated by ammonium sulfide,%                   ≤0.1                   0.2
水溶液反应Solution reaction                                合格                     合格
澄清度试验Clarity                                                合格                     合格
水不溶物Insoluble matter in water,%                   ≤0.003               0.01
氯化物(Cl)Chloride,%                                          ≤0.0005             0.001
硫酸盐(SO4)Sulfate,%                                         ≤0.003                0.003
铁(Fe)Iron,%                                                       ≤0.0001              0.0005