Items

Specification

Appearance

White granular powder

Assay( on dry basis)

98.00-102.00%

Taste

Pure

Specific rotation

+14.50°~+16.50°

Transmittance

≥95.0%

Loss on drying

≤4.50%

Residue on ignition

≤0.2%

pH

4.50-6.00

L-phenylalanine

≤0.50%

Heavy metals(as Pb)

≤10ppm

Arsenic(As)

≤3ppm

5-benzyl-3,6-dioxo-2-piperazineacetic acid

≤1.5%

Other related substances

≤2.0%