硝酸镉,四水

四水硝酸镉为无色斜方结晶，具潮解性。相对密度2.45，熔点59.5℃,沸点132度。四水物加热到70-80℃或置于硫酸干燥器中，可失水而形成无水物，加热到360℃以上，会分解放出氧化氮而生成氧化镉。易溶于水，能溶于醇、丙酮和乙酸乙酯，几乎不溶于浓硝酸。与有机物混合时，发热自燃并爆炸硝酸镉为强氧化剂。有毒！

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
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
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

ACS级
项目名称Item                                      ACS Grade
含量Assay                                           ≥99.0%
不溶物Insoluble matter                              ≤0.005%
氯化物（Cl）Chloride（Cl）                              ≤0.005%
硫酸盐（SO₄）Sulfate                                  ≤0.002%
钙（Ca）Calcium（Ca）                                   ≤0.02%
铜（Cu）Copper（Cu）                                    ≤0.002%
铅（Pb）Lead（Pb）                                      ≤0.005%
镁（Mg）Magnesium（Mg）                                 ≤0.02%
锌（Zn）Zinc（Zn）                                      ≤0.05%
铁（Fe）Iron（Fe）                                      ≤0.001%


99.99% metals basis:


外观Appearance                            white powder or crystals
X-射线衍射分析X-Ray Diffraction           Conforms to Structure
纯度Purity                                ≥99.99% Based on Trace Metals Impurities
ICP Major Analysis                        Confirms Hafnium component
镉Cd by complexometri ctitration          35.3%-37.6%  
总痕量金属杂质total metallic impurities   ≤200ppm by ICP Atomic emission



99.999% metals basis:


外观Appearance                            white powder or crystals
X-射线衍射分析X-Ray Diffraction           Conforms to Structure
纯度Purity                                ≥99.999% Based on Trace Metals Impurities
ICP Major Analysis                        Confirms Hafnium component
镉Cd by complexometri ctitration          35.3%-37.6%  
总痕量金属杂质total metallic impurities   ≤20ppm by ICP Atomic emission

硝酸镉用作玻璃和陶瓷的着色剂，照相胶片用乳化剂，以及分析试剂，也用于制造其他镉盐和氧化镉、催化剂、电池和含镉药剂等。