Tests Standard USP32 Appearance White or off-white powder Identification A. An orange-yellow precipitate is formed. B. A pale blue precipitate is formed C. A deep red color is produced. PH(5% in water) 3.0-7.0 Water ≤5.0% Residue on ignition ≤0.1% Lead ≤10ppm Limit of Aldehydes ≤0.05% Limti of Hydrazine ≤1ppm Vinylpyrrolidone (HPLC) ≤0.001% K-Value (1% aqueous solution) 27-32.4 Nitrogen content(on anhydrous basis) 11.5%-12.8% Total Aerobic plate count CFU/g ≤100 Mold/Yeast ,CFU/g ≤100 Staphylococcus Aureus, CFU/g Negative Salmonella, CFU/g Negative Pseudomonas aeruginosa, CFU/g Negative E.coli CFU/g Negative Conclusion This batch meets the requirement of Ph.USP32/NF27