性状  白色结晶。有两种晶体。易吸湿。热至132℃分解。易溶于水、乙醇、甲醇和丙酮，几乎不溶于浓硝酸。低毒，半数致死量(大鼠，经口)3900mg/kg。有氧化性，加热放出氧，遇有机物、硫黄等即发生燃烧和爆炸。
密度:1.896
熔点：42.7
   
质量标准  
   GB 668-78
项目ltem                                     分析纯      化学纯
                                              (AR)        (CP)
含量[Ca(NO3)2•4H2O]Assay,%                 ≥ 99.0        99.0
pH(50g/L溶液,25℃)pH of water solution        4.0～6.0    4.0～6.0
澄清度试验Clarity                             合格        合格
水不溶物lnsoluble matter in water,%        ≤ 0.003       0.01
氯化物(Cl)Chloride,%                       ≤ 0.003       0.01
硫酸盐(SO4)Sulfate,%                       ≤ 0.01        0.03
铵盐(NH4)Ammonium,%                        ≤ 0.005       0.01
磷酸盐(PO4)Phospate,%                      ≤ 0.005       0.001
铁(Fe)Iron,%                               ≤ 0.0002      0.0005
钡(Ba)Barium,%                             ≤ 0.005       0.01
碱金属及镁(以硫酸盐计)Alkali metals and
magnesium,%                                ≤ 0.2         0.4
重金属(以Pb计)Heavy metals,%               ≤ 0.0005      0.001

品级Grade                               植物细胞培养级 
                                    (plant cell culture tested,>99%)
外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥99.0% (EDTA Titration) 
水溶解试验solubility in water           Clear,20G/100ML水
植物细胞培养测试Plant cell culture test PASS

品级Grade                               细胞培养级 
                                    (plant cell culture tested,>99%)
外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥99.0% (EDTA Titration) 
水溶解试验solubility in water           Clear,20G/100ML水
细胞培养测试Cell culture test           PASS

品级Grade                                ACS级 
                                    (grade ACS reagent)
含量assay                               ≥99.0% (KT)
pH                                      5.0-7.0 (25 °C, 50 mg/mL in H2O)
痕量阴离子anion traces by ICP Atomic emission
  氯chloride (Cl-):                     ≤20 ppm
  硫酸根sulfate (SO42-):                ≤20 ppm
痕量阳离子cation traces by ICP Atomic emission
  Ba:                                   ≤10 ppm
  Cd:                                   ≤5 ppm
  Co:                                   ≤5 ppm
  Cr:                                   ≤5 ppm
  Cu:                                   ≤2 ppm
  Fe:                                   ≤5 ppm
  K:                                    ≤50 ppm
  Mg:                                   ≤500 ppm
  Mn:                                   ≤5 ppm
  Na:                                   ≤50 ppm
  Ni:                                   ≤5 ppm
  Pb:                                   ≤5 ppm
  Sr:                                   ≤100 ppm
  Zn:                                   ≤5 ppm

99.98% metals basis:

外观Appearance                          White Powder
X-射线衍射分析X-Ray Diffraction         Conforms to Structure
纯度Purity                              ≥99.98% Based on Trace Metals Impurities of ICP
ICP Assay                               Confirms Calcium component
痕量金属分析total metallic impurities   ≤200ppm by ICP Atomic emission
贮存  易吸潮
用途  分析上检测硫酸盐和草酸盐，配制基础培养基，电子管（碳酸盐涂覆阴极用）。制造白炽灯罩及其他硝酸盐。
联合国编号  1454
Risk：          R36 R8
Safety :  S17  S26  S39
Hazard :  O  Xi