L-Threonine, CAS No.72-19-5, a essential amino acid amino acid manufactured through fermentation process. L-threonine function: a key component of collagen, elastin and enamel proteins. It aids in proper fat metabolism in the liver; nutrients are more readily absorbed when threonine is present. L-threonine also helps the digestive and intestinal tracts function more smoothly. Uses: L-Threonine is used in animal feed, poultry feed and food nutrition supplements. In cosmetics and personal care products, the function as hair conditioning agents and skin conditioning agents â?? miscellaneous. As an experienced L-Threonine manufacturer and supplier, we has been supplying and exporting L-Threonine for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. L-Threonine food grade Specification ITEM STANDARD Apperance White Crystalline powder Identification Meets the requirements Assay % 98.5-101.5 Lead mg/kg 5 Loss on Drying % 0.2 Specific rotation[a]D20 -26.5~ -29.0 Residue on Ignition % 0.1 L-Threonine feed grade Specification ITEM STANDARD Appearance White or sandy beige crystal powder, no obvious purity Identification Corresponds to standard C4H9NO3 Content(dry basis) % 98.5 Specific Rotation [a] D20 -25.- -29.0 Loss on drying % 0.5 Residue on Ignition % 0.5 Arsenic (As AS) Mg/Kg 2.0 Heavy Metals(As Pb) Mg/Kg 30