Items

Specifications

Results

Appearance

Orange to range-red crystalline powder

Orange-red crystalline

Identification

IR,HPLC

Conforms

Melting point

222.0227

226.0227

Solubility

Hardly soluble in water, slightly soluble in methanol, ethanol, ,easily soluble in tetrahydrofuran

1g dissolved in 700ml ethanol & 1g not dissolved in 700ml water

Loss on Drying

≤ 0.5%

0.1%

Residue on ignition

≤ 0.1%

0.05%

Heavy metals

≤ 20ppm

Conforms

Chromatographic purity

Single impurity

Total impurity

≤  0.5%

≤1.0%

0.48%

0.70%

Assay (HPLC)

98.0%-102.0%

99.80%