DL-Methionine, L-Methionine
Synonyms: DL-2-Amino-4-(methylthio)butyric acid, L-Met, L-2-Amino-4-(methylthio)butyric acid;
- Molecular formula: C5H11NO2S
- CAS No.: 59-51-8, 63-68-3
- EINECS No.: 200-432-1, 200-562-9
- Appearance: White flaky crystalline or crystalline powder
- Package: 25kg/drum，2kg/carton
DL-Methionine technical data:
| Item | Food Grade | Industrial Grade | Chemically Pure |
| DL-Methionine content % ≥ | 99 | 99 | 98.5 |
| Chloride(CL) % ≤ | 0.019 | 0.02 | 0.02 |
| Sulfate(SO4) % ≤ | 0.05 | 0.05 | 0.02 |
| Heavy metals(Pb)% ≤ | 0.002 | 0.002 | 0.02 |
| Moisture % ≤ | 0.5 | 0.5 | 0.5 |
| Residue on ignition % ≤ | 0.1 | 0.1 | 0.2 |
| Iron(Fe)% ≤ | 0.001 | 0.001 | 0.003 |
| Ammonium(NH4)% ≤ | 0.001 | ||
| PH（1g/100ml water) | 5.6～6.1 |
Application:
1. Amino acid drugs. Nutritional supplements. Used for liver cirrhosis and fatty liver, etc
2. Formulated into a seasoning liquid.
3. Used for amino acid infusion and comprehensive amino acid preparations.
4. Used as a feed additive and also in photography technology
L-Methionine technical data:
| Item | Content |
| L-Methionine content % ≥ | 98.5 |
| Specific rotation[a]D20° | +23.0～+24.5 |
| Chloride(CL) % ≤ | 0.02 |
| Sulfate(SO4) % ≤ | 0.05 |
| Heavy metals(Pb)% ≤ | 10PPm |
| Residue on ignition % ≤ | 0.1 |
| Ammonium(NH4)% ≤ | 0.02 |
| Arsenic(As2O3) ≤ | 1PPm |
| Loss on drying ≤ | 0.5 |
Application:
L-methionine is the main component of proteins, the raw material for synthesizing hormones, and the primary substance for maintaining life. In medicine, it is mainly used to treat hepatitis, cirrhosis, toxic hepatitis, hepatic coma, fatty liver, amino acid infusion, and liver dysfunction caused by protein deficiency; Used as a food additive in the food industry, as an additive in the feed industry, and widely used in biopesticides.