Specific rotation[α] ²⁰ _D

旋光度

+27.5~+29.5 ^ο

Transmittance

透过率

≥95.0%

Chloride

氯化物

≤0.04%

Ammonium

铵

≤0.02%

Sulfate

硫酸盐

≤0.030%

Iron

铁

≤10ppm

Heavy metals

重金属

≤10ppm

Arsenic

砷

≤1ppm

Other amino acids

其他氨基酸

Chromatographically not detectable

Loss on drying

干燥失重

≤11.4%

Residue on ignition

灼烧残渣

≤0.20%

Chemical name

化学名称

l-glutamic acid, compd. with l-lysine (1:1)

Molecular formula

分子式

C ₁₁ H ₂₃ N ₃ O ₆ ·2H ₂ O

Molecular weight

分子量

329.35

Assay

含量

98.0~102.0%

PH

pH值

6.0~7.5