L Methionine

Appearance

White crystals or crystalline powder

Active content:

Min. 98%

Assay, %

98.5～101.5

Identification

Infrared absorption

Specific optical rotation

+22.4～+24.7°

pH value

5.6~6.1

Loss on drying,%

≤0.30

Residue on ignition,%

≤0.4

Chloride, %

≤0.05

Sulphate(SO4
-2),%

≤0.03

Iron ,%

≤0.003

Heavy metals ,%

≤0.0015