1. Appearance: White or almost white, impalpable, fine powder. Free from foreign matters.2. Assay:97.0% to 103.0%3. Solubility:Practically insoluble in water, freely soluble in ethanol, sparingly soluble in acetone , and in fatty oils4. Identification:A: I.R.B: TLCC: UV 5. Melting point:126 to 1316. Specific rotation:+ 186°to + 194°(BP)+ 175°to + 183°(USP)7. Related substances:Any maximum impurity:0.5% max.Total of all impurities: 0.8% max.8. Loss on drying:0.5% Max.9.Residual solvents Methanol: ≤500PPMEthanol: ≤2000PPMToluene: ≤300PPM Cyclohexanone:≤50PPM