白色单斜晶系结晶或粉末。 溶于水，水溶液呈碱性。溶于甘油，不溶于乙醇。
熔点  884 °C(lit.) 
沸点  1700°C 
密度  2.68 g/mL at 25 °C(lit.) 
折射率  1.484 

GB/T 9853-88
项目Item                                              分析纯     化学纯
                                                                (AR)       (CP)
含量(Na2SO4)Assay,%                    ≥  99.0       98.0
pH(50g/L溶液，25℃)pH                      5.0-8.0   5.0-8.0 
of water solution
澄清度试验Clarity                          合格      合格
水不溶物Insoluble matter in water,%    ≤  0.005     0.02
灼烧失重Ignition loss,%                ≤  0.2       0.5
氯化物(Cl)Chloride,%                   ≤  0.001     0.005
总氮量(N)Total nitrogen,%　            ≤  0.0005    0.001
磷酸盐(PO4)Phosphate,%                 ≤  0.001     0.002
钾(K)Potassium,%                       ≤  0.01       --
钙(Ca)Calcium,%                        ≤  0.002     0.005
铁(Fe)Iron,%                           ≤  0.0005    0.0015
重金属(以Pb计)Heavy metals,%           ≤  0.0005    0.002

ACS级
项目名称　                                         ACS Grade
含量(Na2SO4)Assay                                   ≥99.0%
pH(5%溶液,25.0℃)pH of a 5% solution at 25.0℃      5.2-9.2
水不溶物Insoluble matter                            ≤0.001%
灼烧残渣Residue after ignition                      ≤0.5%
氯化物(Cl)Chloride(Cl)                              ≤0.001%
含氮化合物(以N计)Nitrogen compounds                 ≤5ppm
磷酸盐(PO4)Phosphate                                ≤0.001%
重金属(以Pb计)Heavy metals(as Pb)                   ≤5ppm
铁(Fe)Iron(Fe)                                      ≤0.001%
钙(Ca)Calcium                                       ≤0.01%
镁(Mg)Magnesium                                     ≤0.005%
钾(K)Potassium                                      ≤0.01%
萃取-浓缩的适应性实验Extraction-concentration
suitability                                         Passes test



品级Grade                               色谱级   
                                (grade for HPLC，≥99.0% (T)) 
外观Appearance                          White Powder
纯度Purity                              ≥99.0% (T) 
非溶性物质insoluble matter,             passes filter test 
水溶性solubility H2O:                   soluble1 M at 20 °C, clear, colorless 
λ                                 10 % in H2O 
UV absorption λ: 220 nm A:              ≤0.1 
  λ: 230 nm A:                          ≤0.05 
  λ: 240 nm A:                          ≤0.03 
  λ: 250 nm A:                          ≤0.02 
  λ: 500 nm A:                          ≤0.02 


99.99% metals basis:


外观Appearance                          White Powder and/or Chunks
纯度Purity                              ≥99.99% Based on Trace Metals Impurities 
硫酸根Gravimetric Analysis(% SO4)       66.3 - 69.0 % 
  , With Barium Chloride 
ICP Major Analysis                      Confirmed 
总痕量金属杂质total metallic impurities ≤100.0 ppm 



99.999% metals basis:


外观Appearance                          White Powder and/or Chunks
纯度Purity                              ≥99.999% Based on Trace Metals Impurities 
硫酸根Gravimetric Analysis(% SO4)       66.3 - 69.0 % 
  , With Barium Chloride 
ICP Major Analysis                      Confirmed 
总痕量金属杂质total metallic impurities ≤10.0 ppm 


品级Grade                               植物细胞培养级   
                                (for plant cell culture, ≥99.0%)
外观appearance                          white to off-white powder 
水溶性solubility                        clear colorless solution at 10 g plus 100 ml water 
干燥损失loss on drying                  ≤0.5% 
纯度Purity                              ≥99.0% (T) 
植物细胞培养试验plant cell culture test passes


品级Grade                               药典级   
                                   (suitable for use as Ph Eur,BP,USP) 
含量assay                              99.0-100.5% (calc. to the dried substance) 
酸度或者碱度acidity or alkalinity,     complies 
残留溶剂residual solvents,             complies 
重金属heavy metals (as Pb)             ≤0.001%  
游离碱free alkali (as NaOH)            ≤0.04%  
游离酸free acid (as H2SO4)             ≤0.05%  
干燥损失loss on drying, 130 °C        ≤0.5%   
氯chloride (Cl-):                      ≤200 ppm 
砷As:                                  ≤2 ppm 
钙Ca:                                  ≤50 ppm 
铁Fe:                                  ≤50 ppm 
镁Mg:                                  ≤50 ppm 
锌Zn:                                  ≤300 ppm 
溶液外观appearance of solution         complies

安全说明         24/25 
    
WGK Germany  1 
    
RTECS           WE1650000 
    
F                        3 
    

用途  焦糖色素制造用剂。食用色素稀释剂。
用途  用作分析试剂和脱水剂
密封干燥保存。