L-Phenylalanine

L ?Phenylalanine Standard：QB/T4264-2011 Items Limits Appearance White crystals or crystalline powder Identification(IR) Conordant with the referennce spectrum Assay 98.5～101.5 Specific rotation -33.2°～-35.2° Transmittance ≥95 Loss on drying ≤0.30 pH 5.4～6.0 Residue on ignition ≤0.1 Chloride (Cl) ≤0.03 Sulfate (SO4) ≤0.03 Iron (Fe) ≤30 Other Amino acide ≤0.5 Heavy metals ≤15 Arsenic(As) ≤1.5 Total plate count(cfu/g) ≤3000 coliform （cfu/g） ≤10 Pathogenic bacteria Negative

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