白色结晶粉末。
熔点：≥300℃
pH range 8.6 - 10.0 
pKa (25 °C) 9.3

≥99.0% (T)：

外观appearance                         white crystalline powder 
水溶性solubility                       clear colorless solution at 15g plus 85ml of water 
红外光谱Infrared spectrometry          Conforms to Structure
水分water by karl fischer              ≤ 1% 
紫外吸收uv absorbance                  ≤ 0.05 at 290nm (15% w/w) 
重金属heavy metals                     ≤ 5 ppm (as lead) 
纯度purity by NaOH titration           ≥ 99% 
note * (anhydrous basis) 


≥99.5% (T)：


外观appearance                         white crystalline powder 
红外光谱Infrared spectrometry          Conforms to Structure
纯度Purity                             ≥99.5% (T) 
insoluble matter,                      passes filter test 
ign. residue                           ≤0.05% 
loss on drying, 110 °C                ≤0.5%  
pH                                     3.0-5.0 (25 °C, 0.5 M in H2O) 
useful pH range                        8.6 - 10.0 
pKa (25 °C)                           9.3 
水溶性solubility H2O:                  soluble0.5 M at 20 °C, clear, colorless 
氯chloride (Cl-):                      ≤50 ppm 
  sulfate (SO42-):                     ≤500 ppm 
  Al:                                  ≤5 ppm 
  As:                                  ≤0.1 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:                                  ≤50 ppm 
  Li:                                  ≤5 ppm 
  Mg:                                  ≤5 ppm 
  Mn:                                  ≤5 ppm 
  Mo:                                  ≤5 ppm 
  Na:                                  ≤50 ppm 
  Ni:                                  ≤5 ppm 
  Pb:                                  ≤5 ppm 
  Sr:                                  ≤5 ppm 
  Zn:                                  ≤5 ppm 
λ                                0.5 M in H2O 
UV absorption λ: 260 nm A:             ≤0.08 
  λ: 280 nm A:                        ≤0.05

WGK Germany  3
F  3 
海关编码  29213099 
危险品标志  Xi,Xn 
危险类别码  36-20/22 
安全说明  26-28-24/25-16

 生物缓冲剂，用在生化诊断试剂盒、DNA/RNA提取试剂盒及PCR诊断试剂盒里
生物研究用Good's缓冲液中的成分
室温