Appearance:Orange red or light brownish yellow crystals
Assay: 98%min

Solubility:
Easily soluble in chloroform, soluble in benzene, slightly soluble in ethanol, insoluble in water

Melting point: 108-111℃
Absorbance: 472-502
Residue on ignition: 0.1% max
Heavy metals: 10ppm max
Arsenic :0.0002% max
Loss on drying: 1.0% max

Residual solvents:
      Ethanol: 0.5% max
      Xylene: 0.217% max
      DMF: 0.088% max
      Sulfur: 0.2% max

Related substances:

The sum of peak area of the impurities obtained with test solution: not more than the area of the principal peak in the chromatogram obtained with reference solution (1.0 percent).

The above products comply with SFDA’s standard YBH16602004.

Package: 25kg/ fibre drum