ال متیونین
Formula | C5H11NO2S |
Chemical formula | C5H11NO2S |
molar mass | 149.21 g/mol |
CAS number | 63-68-3 |
HS Code | 29304010 |
EC number | 200-562-9 |
Storage | Store at 15 to 30° C |
SDS | available |
RTECS | PD0457000 |
Odour | characteristic |
Form | solid |
Color | off white |
Solubility in water | 48.0 g/l |
Melting point | 280 – 285° C |
Thermal decomposition | ~ 280° C |
Assay | 98.0 to 101.0 | % | |
Appearance | Conforms | ||
Solubility | Conforms | ||
Identification | Conforms | ||
Appearance of solution | Conforms | ||
Loss on drying | ≤ | 0.5 | % |
pH | 5.5 to 6.5 | ||
Specific optical rotation | +22.5 to 24.0 | ° | |
Chloride | ≤ | 0.02 | % |
Sulfate | ≤ | 0.03 | % |
Heavy metals | ≤ | 0.001 | % |
Ammonium | ≤ | 0.01 | % |
Iron | ≤ | 0.001 | % |
Ninhydrin -positive substances | Conforms | ||
Sulfated ash | ≤ | 0.1 | % |
L-Methionine is an essential sulfur-containing amino acid involved in protein synthesis and various metabolic processes in living organisms.
🏭⚗️ Production
Industrially, L-Methionine is produced mainly by chemical synthesis methods such as the Strecker synthesis or by fermentation using genetically engineered microorganisms. In pharmaceutical and supplement manufacturing, purification and crystallization steps ensure high purity.
🔬 Properties
L-Methionine appears as a white crystalline powder, soluble in water, with the chemical formula C₅H₁₁NO₂S and a molar mass of approximately 149.21 g/mol. It contains a thioether side chain and is stable under normal conditions.
🧪 Applications
It is widely used as a dietary supplement in animal feed and human nutrition, as well as in pharmaceuticals for treating certain deficiencies. Additionally, L-Methionine serves as a precursor for the synthesis of other sulfur-containing compounds.
⚠️ Safety
L-Methionine is generally recognized as safe (GRAS) when used appropriately. Excessive intake may cause side effects such as gastrointestinal discomfort. It should be stored in a cool, dry place, away from strong oxidizing agents.
