Appearance: white or almost white crystalline powder
Melting point:205--209¡æ
Identification(1) complies by IR
(2)complies by uv
Specific Rotation +45¡ã--+51¡ã
Related substances: total impurity not more than 2.0%
Individual impurity not more than 1.0%
Loss on drying: not more than 1.0%
Assay:97.0-103.%(HPLC)
Particle size: 90% should be not more than 10um
98% should be not more than 20um
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