Description: White or almost white crystalline powder Melting point: 210.0~220.0°C Rotation: +31~+35° Loss on drying: ≤0.5% Residue on ignition: ≤0.1% Heavy metals: ≤10ppm Assay(UV): 98.0~101.5% Purity(HPLC): ≥99.0% Packing: 25kg/barrel Complies with Tuoxin Standard Storage: Keep dry, stable at room temperature.