41863-30-3

Basic information

• Product Name: sodium DL-methionate
• Synonyms: sodium DL-methionate;DL-Methionin, Natriumsalz;(±)-Methionine sodium;DL-Methionine sodium
• CAS NO: 41863-30-3
• Molecular Formula: C₅H₁₀NO₂S*Na
• Molecular Weight: 171.19317
• EINECS: 255-568-4
• Mol File: 41863-30-3.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 306.9°C at 760 mmHg
• Flash Point: 139.4°C
• Appearance: /
• Vapor Pressure: 0.00017mmHg at 25°C
• CAS DataBase Reference: sodium DL-methionate(CAS DataBase Reference)
• NIST Chemistry Reference: sodium DL-methionate(41863-30-3)
• EPA Substance Registry System: sodium DL-methionate(41863-30-3)

Safety Data

• Hazardous Substances Data: 41863-30-3(Hazardous Substances Data)

Usage

InChI:InChI=1/C5H11NO2S.Na/c1-9-3-2-4(6)5(7)8;/h4H,2-3,6H2,1H3,(H,7,8);/q;+1/p-1

Upstream product

• 19298-72-7 DL-methionine amide 
• 13253-44-6 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione 

Downstream Products

• 87459-76-5 N-(3-benzoilmercaptopropionil)-DL-metionina 
• 1115-47-5 N-acetyl-DL-methionine 
• 59-51-8 DL-methionine 

Relevant articles and documents

METHOD FOR MAKING METHIONINE

The invention concerns a continuous process for manufacturing methionine by alkaline hydrolysis of methionine hydantoin in aqueous phase, removing NH3 and CO2 of the hydrolysis medium, and neutralizing the obtained methioninate salt, according to which, after removal of NH3 and CO2, the hydrolysis reaction medium is concentrated to precipitate Na2CO3, said Na2CO3 being separated then recycled for alkaline hydrolysis, the latter being carried out in the presence of NaOH and Na2CO3.

Method for the continuous preparation of methionine or methionine derivatives

The direct saponification of methionine nitrile obtained from methylmercaptopropionaldehyde, prussic acid and ammonia gives low yields, catalyst and educt losses and unwanted side-products. The aim of the invention is therefore to provide a method which can be carried out without isolating the intermediate products, in particular continuously, and with low losses. The ketone used is recovered in high yields after amide saponification since this liberates the ketone from side-products. In order to recover the ammonia, it is necessary for the ammonia to be substantially freed of ketone, the mixture of ammonia, ketone and water obtained being separated under pressure in a separation column. When the amide is saponified at ≥160° C., amide concentrations of less than 25% by wt. are preferred. Methionine nitrile is produced by treatment with at least 4 equivalents of ≥50% by wt. ammonia at between 40° and 80° C./or between 5 and 60 min. Cyanide residues are destroyed by heating to over 150° C. Methionine is of particular use as a feedstuff, in particular in aqueous solution.