Appearance: White or off-white crystalline powder
Identification: Complies
Melting point: about 126’C
Assay: 99.0%~101.0%

Appearance of solution: 

 1)  Clarity:  Not more opalescent than reference suspension Ⅱ
 2)  Color:  Not more intensely coloured than reference solution Y6

Specific optical rotation: -0.10°~ +0.10°
Chlorides: 200ppm max
Heavy metals:10ppm max
Loss on drying: 0.5% max
Residue on ignition: 0.1% max
Residual solvent: 2000ppm max

Related substances:

  Single impurity: 0.1% max
  Total impurities: 0.3% max

Package: 25kg/fibre drum