Features Specifications:Sell L-Leucine  L-Leucine CAS No. 61-90-5 Standard: AJI92 & USP30 Appearance: White crystalline powder Identification: Infrared Absorption Assay: 98.50% ~ 101.00% Specific Rotation: +14.9°~ +16.0° State of Solution: Clear and Colorless Transmittance: 98.00% Min. Loss on Drying: 0.20% Max. Residue on Ignition: 0.10% Max. Chloride (Cl): 0.020% Max. Ammonium (NH4): 0.020% Max. Sulfate (SO4): 0.02% Max. Iron (Fe): 10ppm Max. Heavy Metals (Pb): 10ppm Max. Arsenic (AS2O3): 1ppm Max. Other Amino Acid: Chromatographically not detected PH Value: 5.5 ~ 6.5