碳酸氢钠/144-55-8

碳酸氢钠/144-55-8

白色粉末或不透明单斜晶系细微结晶。无臭，味咸。 熔点 >300 °C(lit.) 沸点 851°C 密度 2.16 g/mL at 25 °C(lit.) 折射率 1.500
质量标准
  

GB/T 640-84                  
项目                                                 优级纯     分析纯    
                                                          (GR)       (AR)     
  
含量(NaHCO₃)Assay,%                 ≥99.8       99.8         
水溶液反应water Solution 
reaction                                             合格       合格      
澄清度试验Clarity                           合格       合格              
水不溶物Insiluble matter in water,% ≤0.005      0.01      
氯化物及氯酸盐(以Cl计)
Chloride and chlorate,%             ≤0.001      0.002     
硫化合物(以SO₄计)Sulur 
compounds,%                              ≤0.002      0.005        
氮化合物(N)Nitrogen,%               ≤0.0005     0.001       
磷酸盐(以PO₄计)Phosphate,%   ≤0.001      0.002     
硅酸盐(以SiO₃计)Silicate,%         ≤0.001      0.005     
镁(Mg)Magnesium,%                   ≤0.002      0.003     
钾(K）Potassium,%　                 ≤0.005      0.01       
铝(Al)Aluminum,%                        ≤0.005      0.01      
钙(Ca)Calcium,%                         ≤0.005      0.007      
铁(Fe)Iron,%                                   ≤0.0005     0.001      
重金属(以Pb计)Heavy metals,%        ≤0.0005     0.001      
还原碘物质(以HCOOH计)               ≤0.005        --       
Substances reducing iodine 

ACS级
项目名称　                                   ACS Grade
含量(NaHCO₃)Assay                 99.7-100.3%
水不溶物Insoluble matter           ≤0.015%
总氮量(以Cl计)Total chlorine       ≤0.003%
磷酸盐(PO₄)Phosphate               ≤0.003%
铵(NH₄)Ammonium                    ≤5ppm
重金属(以Pb计)Heavy metals         ≤5ppm
铁(Fe)Iron                                     ≤0.001%
钙(Ca)Calcium                            ≤0.02%
镁(Mg)Magnesium                      ≤0.005%
钾(K)Potassium                           ≤0.005%



品级Grade                               色谱纯   
                                      (for HPLC，≥99.0%) 
含量assay(calc. based on dry substance) ≥99.0% (T) 
pKa (25 °C)                           (1) 6.37, (2) 10.25 (carbonic acid) 
水溶解试验solubility in water           无色透明，0.1 g/mL
λ ≥10 % in H2O 
紫外吸光值UV absorption 
  λ: 240 nm A:                          ≤0.1 
  λ: 250 nm A:                          ≤0.04 
  λ: 260 nm A:                          ≤0.02 
  λ: 280 nm A:                          ≤0.01 
  λ: 500 nm A:                          ≤0.01          
RP gradient test                         Pass


品级Grade                               分子生物学   
                                   (for molecular biology, 99.7-100.3%) 
外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              99.8 - 100.2% (T)  
水溶解试验solubility in water           合格,10g/100ml水
硫化合物Sulfur compounds             ≤ 0.003% (AS SULFATE) 
重金属Heavy metals                         ≤ 5 PPM (AS LEAD) 
铁Iron(Fe)                                             ≤ 0.001% 
钾Potassium(K)                                   ≤ 0.005% 
DNASE, RNASE AND PROTEASE              NONE DETECTED 

品级Grade                               药用级   
                                        (USP) 
鉴定试验Identity                       PASS
纯度Purity（titration)                 99-101 %
干燥失重Loss on drying                 ≤0.25%
不溶物Insolubles                       PASS
正常碳酸盐Normal carbonate             PASS
氯化物Chloride                         ≤0.015%
硫化合物Sulphur compounds              ≤0.015%
砷Arsenic                              ≤2 ppm
重金属Heavy metals (as Pb)             ≤5 ppm
氨Ammonia                              PASS


品级Grade                           细胞与昆虫细胞培养级， 99.5-100.5%   
                    (for cell culture,for insect cell culture, 99.5-100.5%) 
外观Appearance                          White Powder
水溶性Solubility                        Colorless，Clear，100 mg/mL, H2O
滴定纯度Purity (Titration by HCl)       99.5 - 100.5 %
血细胞培养测试Cell by Hemocytometry     Pass
昆虫细胞培养测试Insect Cell Test        Pass