L-Isoleucine powder, CAS No.73-32-5, an isomer of L-Leucine, essential amino acid manufactured by fermentation from carbohydrate sources. No raw materials of animal origin are used in the production process. It is one of the branched chain amino acids (L-isoleucine, L-valine, and L-leucine). As an experienced L-Isoleucine manufacturer and supplier, we has been supplying and exporting L-Isoleucine 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-Isoleucine Specification ITEM STANDARD Appearance White crystals or crystalline Powder Specific rotation +38.6-+41.5 PH 5.5-7.0 Loss on drying â?¤0.3% Heavy metals(Pb)20ppm Content 98.5~101.0% Iron(Fe) 20ppm Arsenic(As2O3) 1ppm Lead10ppm Other Amino Acids Chromatographically not detectable Residue on ignition (Sulfated) 0.2% Organic Volatile impurities