Specifications: 1) Appearance: fine red-brown powder 2) Odor: characteristic 3) Assay (OPC, UV): ≥95.0% 4) Sieve analysis: 100% pass through 80 mesh 5) Loss on drying: ≤3.0% 6) Residue on ignition: ≤1.0% 7) Bulk density: 40 - 55g/100ml 8) Extract solvent: alcohol and water 9) Heavy metal: <20ppm 10) Arsenic (As): <2ppm 11) Residual solvents: meets European Pharm2000 standard

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