Appearance: Off-White to Light Tan Powder. APHA Color, 1% Aqueous Solution: = 200. Assay (Titration): 98. 0 - 102. 0 %. Bioburden: = 100 CFU/g. Endotoxin : = 0. 04 EU/mg. Heavy Metals (as Pub): = 15 ppm. Identification (IR): Conforms to known structure. Moisture : 12. 0 - 16. 0 %. pH (1% Solution in Water)@ 25 orc: 10. 5 - 11. 5. Solubility (10% solution in H2O): Clear, Complete Yellow Solution. Solubility, 1% solution in H2O: Clear, Complete Pale Yellow Solution. Specific Rotation: -14. 4 - - 12. 6 °. BSE/TSE Free: BSE/TSE Free.