Features Specifications:L-Leucine  L-LEUCINEChemical Name: (S)-2-Amino-4-methylpentanoic acid Structure Formula: Molecular Formula: C6H13NO2 Molecular Weight: 131.17 Cas No: [61-90-5] Characteristics: White crystals or crystalline powder. Odorless, slightly bitter taste. Freely soluble in formic acid, sparingly soluble in water, very slightly soluble in ethanol or in ether, dissolves in dilute hydrochloric acid. Quality Standards: USP25 Item USP25 Description White crystals or crystalline powder Identification Infrared absorption Specific rotation [a]D25 ° +14.9 °- +17.3° PH 5.5-7.0 Loss on drying ≤ 0.2% Residue on ignition ≤ 0.4% Chloride ≤ 0.05% Sulfate ≤ 0.03% Iron ≤ 0.003% Heavy metals ≤ 0.0015% Organic volatile impurities Meets the requirements Assay 98.5-101.5% Packaging and Storage: In 25kgs f iber drum double polyethylene bags inside; Preserve in well- closed containers, at controlled room temperature. Recommended limit: 2 year.