Appearance

White or similar sheet crystal powder

White crystalloid

Solubility in alcohol

Clear and no deposit

Complies

Identification A

The chloroform acquires a blood-red color and the sulfuric acid shows a green fluorescence.

Complies

Identification B

A pink color is produced, and it rapidly changes to red, then to blue, and finally to a brilliant green.

Complies

Melting range

147°C~150°C

148.3°C

Specific rotation

-34°~ -38°

-36.4°

Acidity

≤0.3 ml

0.25 ml

Loss on drying

≤0.3%

0.18%

Residue on ignition

≤0.1%

0.08

Purity

≥95%

96.4%

Conclusion

This product can meet the USP32 standard.