Appearance: White to slight yellow crystalline powder Identification: Conforms Solubility: Colorless Water: ≤8.0 Residual on ignition: ≤0.5% Specific optical rotation: +60°~+70° Transmittance: ≥80% Assay: ≥80.0%（Calculated by cefotiam anhydrous） pH: 1.2-1.7 Related substance: ≤1.5% Acetone: ≤3.0%