Items Specifications Appearance Colorless,clear,viscous liquid Identification TLC: Standard solution and test solution same spot，RF Specific optical -2.4°~ -2.8° Heavy metals ≤10ppm Sulfate ≤0.02% Chloride ≤0.02% Phosphate lon The color of solution not stronger than the control solution（5ppm） Residual Solvent（methanol） ≤100 ppm pH 5.0~7.0 Water content 14.0~16.0% Assay（dried basis） 98.0~102.0%
