Pyridoxine is one of the vitamins of the B6 complex; present in many foodstuffs (yeast, liver and cereals). Pyridoxine has a role in transporting protein Bsu1, Pyridoxine contributes to thiamine uptake; characterization of thiamine (vitamin B1) transporter Thi9 from Schizosaccharomyces pombe.Appearance of Solution:To pass USPMelting Point:205-209°CHeavy Metals:≤0.001%Lead:≤0.0002%Arsenic (As2O2):≤0.0002%Chloride (Cl-):≤0.03%pH:2.4-3.0Loss on Drying:≤1%Residue on Ignition:≤0.1%Infrared Spectrum:Conforms to structureYeast and Mold:Total: ≤100cfu/gColiform Organisms, E. coli, Salmonella, Staphylococcus aureus:NegativeTotal Plate Count: ≤1000cfu/gOrganic Volatile Impurities:To meet requirementsResidual Solvents:To pass testRelated Substances:Within Limited Amount USPStorage and Stability:Store at RT. Stable for 6 months after receipt.Meets or exceeds USP specifications