熔点  280 °C ，密度  1.77 g/mL at 25 °C(lit.)， 折射率  n20/D 1.396 ，闪点  26 °C 
白色结晶体，热至100℃开始分解成氨及硫酸氢铵，副产品带微黄或灰色，吸湿性小，不易结块，所以比较容易保存，且较易溶于水，不溶于乙醇和丙酮;

AR
GB/T 1396-93
项目Item                                                                  分析纯            化学纯
GB/T 1396-93
项目Item                                                           分析纯      化学纯
                                                                              (AR)        (CP)
含量［(NH42SO4)Assay,%                                  ≥99.0      99.0
pH(50g/L溶液，25℃)                                     4.8-6.0    4.8-6.0
澄清度试验Clarity                                        合格       合格
水不溶物Insoluble matter in water,%                     ≤0.002     0.01
灼烧残渣(以硫酸盐计)Ignition residue,%                  ≤0.01      0.5
氯化物(Cl)Chloride,%                                    ≤0.0005    0.001
硝酸盐(NO3)Nitrate,%                                    ≤0.001     0.005
磷酸盐(PO4)Phosphate,%                                  ≤0.0005    0.002
钙(Ca)Calcium,%                                         ≤0.005      --
铁(Fe)Iron,%                                            ≤0.0002    0.0005
砷(As)Arsenic,%                                         ≤0.00002   0.0002
重金属(以Pb计)Heavy metals,%                            ≤0.0005    0.002

品级Grade                               优级纯   
                                        (GR)
含量assay                              ≥99.5% (T) 
不溶物insoluble matter,                passes filter test 
灼烧残渣Residue on ignition            ≤0.01% (as SO4) 
干燥失重loss on drying                 ≤0.1% , 110 °C 
pH                                     5.0-6.0 (25 °C, 1 M in H2O) 
水溶性solubility H2O:                  soluble1 M at 20 °C, clear, colorless 
氯chloride (Cl-):                      ≤5 ppm 
硝酸根nitrate (NO3-):                  ≤10 ppm 
硫酸根phosphate (PO43-):               ≤5 ppm 
阳离子cation traces 
  Al: ≤5 ppm 
  As: ≤0.2 ppm 
  Ba: ≤5 ppm 
  Bi: ≤5 ppm 
  Ca: ≤10 ppm 
  Cd: ≤1 ppm 
  Co: ≤5 ppm 
  Cr: ≤5 ppm 
  Cu: ≤2 ppm 
  Fe: ≤2 ppm 
  K: ≤50 ppm 
  Li: ≤5 ppm 
  Mg: ≤5 ppm 
  Mn: ≤5 ppm 
  Mo: ≤5 ppm 
  Na: ≤50 ppm
  Ni: ≤5 ppm 
  Pb: ≤2 ppm 
  Sr: ≤5 ppm 
  Zn: ≤1 ppm 
λ 1 M in H2O 
UV absorption 
  λ: 260 nm A:                   ≤0.037 
  λ: 280 nm A:                   ≤0.030  

品级Grade                               用于分子生物学   
                                    (for molecular biology, ≥99.0%) 
外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
含量assay                               ≥99.0%(中和滴定） 
水溶解试验solubility in water           CLEAR ,2G/3ML WATER
不溶物Insoluble matter                  ≤0.005%
氯chloride (Cl-):                       ≤5 ppm 
铜Cu:                                   ≤5 ppm 
铁Fe:                                   ≤5 ppm 
锌Zn:                                   ≤5 ppm 
重金属heavy metals (as Pb):             ≤2 ppm 
UV ABSORBANCE,1 M SOLUTION 
  A1M/260                               ≤0.03 
  A1M/280                               ≤0.025 
DNase, RNase, and protease              none detected

品级Grade                               用于植物细胞培养  
                                    (plant cell culture tested, ≥99.0%) 
外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
含量assay                               ≥99.0%(中和滴定） 
水溶解试验solubility in water           CLEAR ,2G/3ML WATER
不溶物Insoluble matter                  ≤0.005%
氯chloride (Cl-):                       ≤5 ppm 
铜Cu:                                   ≤5 ppm 
铁Fe:                                   ≤5 ppm 
锌Zn:                                   ≤5 ppm 
重金属heavy metals (as Pb):             ≤2 ppm 
植物细胞培养Plant cell culture test     PASSES

≥99.99% metals basis：

外观Appearance                          白色结晶
X-射线衍射分析X-Ray Diffraction         Conforms to standard
纯度Purity                              ≥99.99% Based on Trace Metals Impurities of ICP
ICP assay                               confirms sulfur component.  
痕量金属分析Trace Metal Analysis        ≤100ppm by ICP Atomic emission
灼烧残渣residue on ignition             ≤0.005% 
不溶物insoluble matter                  ≤0.005%  (c=10%, H2O) 
氯chloride                              ≤5 ppm  
铁iron                                  ≤5 ppm  
重金属heavy metals                      ≤5 ppm  (as pb) 
硝酸根nitrate                           ≤0.001% 
pH                                      5.0 - 6.0 ， 25 °C (c=5%, H2O) 
磷酸盐phosphate                         ≤5 ppm
 
≥99.999% metals basis：

外观Appearance                          白色结晶或结晶粉末
X-射线衍射分析X-Ray Diffraction         Conforms to standard
红外光谱鉴别Infrared spectrometry       Conforms to Structure 
纯度Purity                              ≥99.999% Based on Trace Metals Impurities of ICP
S 23,7 - 24,9 % (Gravimetric Analysis With Barium Chloride)
SO4 71,2 - 74,2 % (Gravimetric Analysis With Barium Chloride) 
痕量金属分析Trace Metal Analysis        ≤10ppm by ICP Atomic emission
(Ca、Cr、Fe、Mg、Na)

生物制剂，沉淀蛋白质，色谱分析试剂，尿液检查，单倍体育种中配制培养基。
医药用作盐析剂、食品酱色的催化剂和用于鲜酵母生产酵母菌的培养。
起运时包装要完整，装载应稳妥。运输过程中要确保容器不泄漏、不倒塌、不坠落、不损坏。严禁与酸类、碱类、食用化学品等混装混运。运输途中应防曝晒、雨淋，防高温。车辆运输完毕应进行彻底清扫。 
 
储存于阴凉、通风的库房。远离火种、热源。应与酸类、碱类分开存放，切忌混储。储区应备有合适的材料收容泄漏物。