性状

含二分子结晶水者为白色结晶。在空气中风化，易溶于热水和稀酸，难溶于冷水。遇金属生成盐类。
熔点：248-255 ºC

质量标准

项目                                     CP
外观Appearance                          White to red crystals or powder
红外光谱鉴别Infrared spectrum           Conforms to strucure
纯度Purity(neutralization titration)    ≥98.0%  
熔点Melting point                       248°C - 255°C



项目                                    AR
外观Appearance                          白色至红色结晶粉末
红外光谱鉴别Infrared spectrometry       和对照匹配
纯度Purity                              ≥98.0% (中和滴定)  
熔点Melting point                       248°C - 255°C
干燥损失Loss on drying                  <0.5 %
重金属Heavy metals (as Pb)              <20 ppm
硫酸盐灰分Sulfated ash                  <0.2 %



项目                                     99.5%,用于糠醛衍生物的比色分析及氰化物
纯度Purity(HPLC)                         ≥99.5% (HPLC)
灼烧残渣ign. residue                     ≤0.05%
熔点Melting point                        248-252 °C (dec.)(lit.)
痕量阴离子anion traces
chloride (Cl-)                           ≤50 mg/kg
sulfate (SO42-)                          ≤500 mg/kg
痕量阳离子cation traces
Ca                                       ≤10 mg/kg
Cd                                       ≤5 mg/kg
Co                                       ≤5 mg/kg
Cr                                       ≤5 mg/kg
Cu                                       ≤5 mg/kg
Fe                                       ≤5 mg/kg
Mg                                       ≤10 mg/kg
Mn                                       ≤5 mg/kg
Ni                                       ≤5 mg/kg
Pb                                       ≤5 mg/kg
Zn                                       ≤5 mg/kg

用途

有机合成，比色测定糠醛及多戊糖.

危险性质
贮存