Items Standard Appearance "White to slightly creamy white, hygroscopic powder or flakes" Identification A. An orange -yellow precipitate is formed B.A pale blue precipitate is formed C.A deep red colour is produced PH(1 in 20) 3.0~7.0 Water â?¤5.0% Residue on ignition â?¤0.1% Lead â?¤ 10ppm Aldehydes â?¤0.05% Hydrazine â?¤ 1ppm Vinylpyrrolidone â?¤0.2% 2-Pyrrolidone â?¤3.0% Peroxides(as H2O2) â?¤400ppm K-value 27.0~32.4 Assay(Nitrogen) 11.5~12.8% TAMC â?¤ 1000 cfu/g TYMC â?¤ 100 cfu/g Staphylococcus Aureus Negative in 10g Salmonella Negative in 10g Pseudomonas Aeruginosa Negative in 10g E.Coli Negative in 10g