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DL-Methionine Food Grade CAS NO:59-51-8

CAS NO:CAS No.:59-51-8,Name: DL-Methionine Molecular formula: C5H11NO2S NO: CAS no: 59-51-8 Molecular weight: 149.21 Properties : White flaky crystal or crystalline
Product Details Basic Information Production Methods and Uses

Name: DL-Methionine Food Grade
Molecular formula: C5H11NO2S
NO: CAS no: 59-51-8
Molecular weight: 149.21

Properties : 

1.White flaky crystal or crystalline powder.

2.Has special smell.

3.Slight sweet taste.

4.Melting point: 281℃(decompound).

5.10% aqueous solution's Ph value is 5.6-6.1.

6.No optical rotation, stable to heat and air.

7.Unstable to strong acid, can cause the demethylation.

8.Soluble in water(3.3g/100ml,25℃), diluted acid and diluted alkali solution.

9.Very hard to dissolve in ethanol, almost does not dissolve in ether.

Use:

DL-Methionine is one of the basic units for composing the protein, is the only sulfur bearing amino acid am.

Production method
1. Methionine can be prepared by extraction method, but there are the following methods in industry:
1. Rhone-Planck process
2. Degu Sa DL-methionine process raw material consumption quota: acrolein 480kg / t, mercaptan 400kg / t, sodium cyanide 420kg / t. ...
Use
1. Product methionine content ≥ 98.5%, is the growth of poultry animals necessary amino acids
First, is the biosynthesis of protein "skeleton" amino acids, the metabolism of animals have a strong regulatory role, widely used in medicine, food, feed and cosmetics and other fields. Which can be used as a major component of amino acid infusion and compound amino acids, and can also be used for the synthesis of medicinal vitamins, the use of its anti-fatty liver effect, can be used to produce hepatoprotective preparations; in food, for food amino acid strengthening and Food health products processing, can be used as nutritional supplements, due to a special smell, it is only used for fish products; in the feed industry, the largest amount of methionine, used as feed nutrition enhancer, make up the amino acid balance Feed additives, in the amino acid nutrient feed additive varieties, methionine 60%, lysine accounted for 30%, other amino acids accounted for about 10%.
2. Used as feed nutrition enhancer, can make up for amino acid balance. Livestock lack of methionine, can cause dysplasia, weight loss, liver and kidney function weakened, muscle atrophy, skin deterioration and so on. Feed 1kg methionine, equivalent to 50kg of fish meal nutritional value. Generally add the amount of 0.05% to 0.2%.

 

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English name: DL-Methionine English alias:2-amino-4- (methylsulfanyl) butanoic acid; (2S) -2-azaniumyl-4-methylsulfanyl-butanoate; Methionine; Methionine; (0R) -2-azobenzyl-4-methylsulfanyl-butanoate; Urimeth; Metione; 2-amino-4- (methylthio) butanoic acid; Cynaron; Dyprin; Lobamine; (+ -) - Methionine; Racemethionine [USAN] (Methylthio) -butyric acid; Acimetion; Banthionine; alpha-amino-gamma-methylmercaptobutyric acid; DL-2-Amino-4- (methylthio) butyric acid; DL-2-Amino- ) Butanoic acid; DL-2-Amino-4-methylthiobutyric acid; H-DL-Met-OH; Racemethionine; CAS No.:59-51-8 EINECS number: 200-432-1 Molecular formula: C5H11NO2S Molecular weight: 149.21 DL-methionine (59-51-8) quality indicators: (In terms of Pb) ≤0.002%; arsenic (calculated as As) ≤0.002%; chlorine (in terms of the amount of dry) ≥98.5%; burning residue ≤0.5%; dry weight loss ≤0.5% Chemical ≤ 0.2%; sulfide ≤ 0.3%. Preparation: 1. D-configuration and L-configuration of the same physiological role of methionine, the use of DL-type, so the synthesis method to create favorable. Generally by acrolein and methyl mercaptan reaction obtained. 2. Commonly used synthetic method with acrylic aldehyde as raw material. Propylene aldehydes and methyl mercaptans are condensed to form methylthiopropanal in the presence of formic acid and copper acetate. And then mixed with sodium cyanide and ammonium bicarbonate solution. Reaction at 90 ° C gave methylthioethylhydantoin. Without the need for separation and purification, can be 28% sodium hydroxide solution with heating to 180 ℃, hydrolysis to produce sodium methionine. Neutralize the finished methionine with hydrochloric acid. Per ton of product consumption of acrylic aldehyde 480kg, methyl mercaptan 400kg, sodium cyanide 420kg. Reference dosage: FEMA (1990): baked goods, breakfast cereals, seasonings, meat products, dairy products, alcoholic beverages, soup, are 50mg / kg. Limited: CFR, § 172.320 (2006): ① not for infants and young children food; ② accounted for food in the total eggs from the quality of 3.1%. safety: 1. GRAS (FEMA). 2. PADI: 20.980 mg (FEMA).    
Production method 1. Methionine can be prepared by extraction method, but there are the following methods in industry: 1. Rhone-Planck process 2. Degu Sa DL-methionine process raw material consumption quota: acrolein 480kg / t, mercaptan 400kg / t, sodium cyanide 420kg / t. ... Use 1. Product methionine content ≥ 98.5%, is the growth of poultry animals necessary amino acids First, is the biosynthesis of protein "skeleton" amino acids, the metabolism of animals have a strong regulatory role, widely used in medicine, food, feed and cosmetics and other fields. Which can be used as a major component of amino acid infusion and compound amino acids, and can also be used for the synthesis of medicinal vitamins, the use of its anti-fatty liver effect, can be used to produce hepatoprotective preparations; in food, for food amino acid strengthening and Food health products processing, can be used as nutritional supplements, due to a special smell, it is only used for fish products; in the feed industry, the largest amount of methionine, used as feed nutrition enhancer, make up the amino acid balance Feed additives, in the amino acid nutrient feed additive varieties, methionine 60%, lysine accounted for 30%, other amino acids accounted for about 10%. 2. Used as feed nutrition enhancer, can make up for amino acid balance. Livestock lack of methionine, can cause dysplasia, weight loss, liver and kidney function weakened, muscle atrophy, skin deterioration and so on. Feed 1kg methionine, equivalent to 50kg of fish meal nutritional value. Generally add the amount of 0.05% to 0.2%.
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