L-Phenylalanine

L –Phenylalanine

Standard:QB/T4264-2011

ItemsLimits

AppearanceWhite crystals or crystalline powder

Identification(IR)Conordant with the referennce spectrum

Assay98.5~101.5

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 bacteriaNegative