L-Methionine
CAS No.:63-68-3
MF: C5H11NO2S
Grade Standard: FCC, AJI,USP
Quality Standard:
Item | Specification (AJI97) |
Appearance | White crystals or crystalline powder |
Assay, % (on dry matter) | 98.5~101.5 |
Specific rotation | +21.9°~+24.1° |
pH value | 5.6~6.1 |
Loss on drying, % | ≤0.3 |
Heavy metals, % | ≤0.0015 |
Residue on ignition, % | ≤0.4 |
Chloride,% | ≤0.05 |
Sulfate,% | ≤0.03 |
Arsenic, % | ≤0.00015 |
Iron, % | ≤0.003 |
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