L-Methionine
Description:
Product Name: L-Methionine
Molecular Formula： C5H11NO2S
Molecular Weight： 149.21
CAS No： 63-68-3
L-methionine, also known as L-methionine, is the levorotatory form of methionine, the chemical formula is C5H11NO2S, and the chemical properties are colorless or white shiny flake crystals or white crystalline powder, with a special smell and slightly bitter taste. The melting point is 280～281℃. It is unstable to strong acid and can cause demethylation. Dissolved in water (5.6g/100mL, 30℃), warm dilute ethanol, alkaline solution or dilute inorganic acid. Hardly soluble in ethanol, almost insoluble in ether.
Methionine is one of essential amino acids constituting the human body, involved in protein synthesis. Because it can not be generated in the body itself, it must be obtained from outside.
Specifications:
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L-Methionine
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USP36
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AJI92
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EP6
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Assay
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98.5-101.5%
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99.0-100.5%
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99.0-101.0%
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PH
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5.6-6.1
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5.6-6.1
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5.5-6.5
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Specific rotation[a]D20
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/
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+23.0°-+24.5°
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+22.5°-+24.0°
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Specific rotation[a]D25
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+22.4°-+24.7°
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/
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/
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Transmittance(T430)
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/
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≥98.0%
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clear & colorless
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Chloride(Cl)
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≤0.05%
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≤0.02%
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≤0.02%
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Ammonium(NH4)
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/
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≤0.02%
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≤0.02%
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Sulfate(SO4)
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≤0.03%
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≤0.02%
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≤0.03%
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Iron(Fe)
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≤30PPM
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≤10PPM
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≤10PPM
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Heavy metals(Pb)
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≤15PPM
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≤10PPM
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≤10PPM
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Arsenic
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/
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≤1PPM
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/
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Other amino acids
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individual impurities≤0.5% total impurities≤2.0%
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conforms
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/
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Ninhydrin-positive substances
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/
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/
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conform
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Loss on drying
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≤0.3%
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≤0.20%
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≤0.50%
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Residue on ignition
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≤0.4
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≤0.10%
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≤0.10%
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Function:
1) Methionine can be used as nutional supplement. DL-methionine has the same effect with L-methionine, but DL-methionine is cheaper.
2) Methionine can be formulated as a flavoring agent.
3) Methionine has a protective role of the liver. Methionine has effects of anti cirrhosis, fatty liver, and a variety of acute, chronic, viral, jaundice liver.
4) Methionine has a myocardial protective effect.
5) Methionine has an antidepressant effect.
6) Methionine has a blood pressure lowering effect.
7) Methionine has an antivirus poison eradicates effect.
8)Methionine is the feed nutrition enhancer.Livestock and poultry lack of methionine, can lead to stunted growth, weight loss,liver and kidney function abate, muscle atrophy, fur, metamorphism and so on.Add 1 kg methionine, feed of 50 kg fish meal nutrition value.Feed in the general content of 0, 05 % to 0.2%.
Application:
1) Methionine is biological protein synthesis skeleton amino acids.
2) Methionine is the necessary growth factors in livestock animal.
3) It can also regulate animal’s metabolism.
4) It is already widely used in feed, medicine, food and cosmetics, etc.
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