Appearance: White crystalline powder Assay: >= 99.00% [a]20D: +49.0°- +55.0° Loss on drying: <= 0.5% Residue on ignition: 26.5%-29.8% Iron(Fe): <=10ppm Heavy metals: <= 10ppm pH: 3.5- 5.0 Lead: <= 5ppm Particle Size: over 95% through 40 Mesh sieve Total Plate Count: <=5000CFU/GM Mould & Yeast: <= 100CFU/GM E. Coli: Negative Salmonella: Negative