project

standard

experimental result

differentiate

Infrared or nuclear resonance

conforms

Loss on drying

0.5% MAX

         0.26%

Ignition residue

0.5% MAX

0.17%

heavy metal

10 ppm MAX

        符合规定

single impurity

0.1% MAX

        符合规定

Total impurities

           1.0% MAX

        符合规定

Assay

（TCL）

≥99.0%

        ≥99.0%

Assay

（HPLC）

          ≥99.0%

         99.57%

melting point

117～120℃

118.3～118.5℃

Conclusion: This product meets the requirementsBP2018/USP39