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Sodium phosphate monobasic dihydrate

Molecular Structure:
MDL:
--MFCD00149209
Molecular Formula:
NaH2PO4·2H2O
Molecular Weight:
137.99
Alias:
磷酸一钠,一盐基磷酸钠 Sodium dihydrogen phosphate dihydrate
Product order:
Name Specifications Packing Price Delivery
Sodium phosphate monobasic dihydrate ACS 500g RMB 74.8 Consulting service
Sodium phosphate monobasic dihydrate 用于分子生物学, ≥99.0% (T) 250g RMB 418 Consulting service
Sodium phosphate monobasic dihydrate AR 500g RMB 49.5 Consulting service
Character:
白色结晶或颗粒,100℃失去全部结晶水。灼热变成偏磷酸钠。易溶于水,几乎不溶于醇,其水溶液呈酸性。
熔点:60 °C
Quality Standard:
 
   GB/T 1268-77
项目Item                      分析纯     化学纯
                                       (AR)        (CP)
含量(NaH2PO4·2H2O)Assay,%            ≥99.0       98.0
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lnsoluble matter    
in water,%                            ≤0.01     0.02
氯化物(Cl)Chloride,%                  ≤0.005    0.01
硫酸盐(SO4)Sulfate,%                ≤0.005    0.01
硝酸盐(NO3)Nitrate,%                ≤0.001    0.002 
钾(K)Potassium,%               ≤0.001      0.002
铁(Fe)Iron,%                     ≤0.001      0.005
砷(As)Arsenic,%                       ≤0.0002     0.0005
重金属(以Pb计)Heavy metals,%          ≤0.001      0.005
氨沉淀物Subsances precipitated        ≤0.01       0.02
by Ammonia,%

ACS级
项目名称                            ACS Grade
含量(NaH2PO4·2H2O)Assay              98.0-102.0%
pH(5%溶液,25.0℃)
pH of a 5% solution at 25.0℃         4.1-4.5%
水不溶物Insoluble matter              ≤0.01%
氯化物(Cl)Chloride                    ≤5ppm
硫酸盐(SO4)Sulfate                    ≤0.003%
钙(Ca)Calcium                         ≤0.005%
钾(K)Potassium                        ≤0.01%
重金属(以Pb计)Heavy metals            ≤0.001%
铁(Fe)Iron                            ≤0.001%


品级Grade                               分子生物学级  
                                  (grade for molecular biology)
含量assay                             ≥99.0% (T)
DNA酶DNases,                          none detected
RNA酶RNases,                          none detected
不溶物insoluble matter,               passes filter test
磷酸酶phosphatases,                   none detected
蛋白酶proteases,                      none detected
pH                                    4.0-4.5 (25 °C, 1 M in H2O)
水溶解试验solubility in water         可溶,1 M, 20 °C, clear, colorless
痕量阴离子anion traces
  chloride (Cl-):                    ≤50 ppm
  sulfate (SO42-):                   ≤50 ppm
痕量阳离子cation traces
  Al:                                ≤5 ppm
  As:                                ≤0.2 ppm
  Ba:                                ≤5 ppm
  Bi:                                ≤5 ppm
  Ca:                                ≤10 ppm
  Cd:                                ≤5 ppm
  Co:                                ≤5 ppm
  Cr:                                ≤5 ppm
  Cu:                                ≤5 ppm
  Fe:                                ≤5 ppm
  K:                                 ≤200 ppm
  Li:                                ≤5 ppm
  Mg:                                ≤5 ppm
  Mn:                                ≤5 ppm
  Mo:                                ≤5 ppm
  Ni:                                ≤5 ppm
  Pb:                                ≤5 ppm
  Sr:                                ≤5 ppm
  Zn:                                ≤5 ppm
λ 1 M in H2O
紫外吸收UV absorption
  λ: 260 nm A:                      ≤0.085
  λ: 280 nm A:                      ≤0.070

Storage:
密封保存。
用途  缓冲剂,软水剂,制造六偏磷酸钠和焦磷酸钠,测定镁、单倍体育种中配制改良怀特培养基。
分子生物学级用于胶电泳-胶缓冲液组分,用于含甲醛的变性胶。
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