L-メチオニン 化学特性,用途語,生産方法
化学的特性
White crystalline powder
使用
Essential aminoacid for human development. Hepatoprotectant; antidote (acetominophen poisoning); urinary acidifier.
使用
methionine is slows down and normalizes oil gland sebum production. Methionine is also used as a texturizer in cosmetic creams. It is an essential amino acid found in a number of proteins and obtained by means of fermentation.
使用
methionine is slows down and normalizes oil gland sebum production. Methionine is also used as a texturizer in cosmetic creams. It is an essential amino acid found in a number of proteins and obtained by means of fermentation.
定義
ChEBI: The L-enantiomer of methionine.
一般的な説明
Minute hexagonal plates from dilute alcohol.
空気と水の反応
Reacts with water, steam, and/or acids to produce toxic and flammable vapors of hydrogen sulfide . Water soluble . pH of 1% aqueous solution is 5.6-6.0.
反応プロフィール
An organosulfide and amine derivative, carboxylic acid. Look at Reactive Groups 20 (organosulfides), 7 (amines), and 3 (carboxylic acids) may give indications about reactive tendencies. L-Methionine is an amino acid essential in human nutrition.
健康ハザード
ACUTE/CHRONIC HAZARDS: L-Methionine is dangerous when heated to decomposition; it emits dangerous and highly toxic fumes.
火災危険
Flash point data for L-Methionine is not available, but L-Methionine is probably combustible.
安全性プロファイル
Mildly toxic by
ingestion and intraperitoneal routes. Human
mutation data reported. An experimental
teratogen. Experimental reproductive
effects. An essential sulfur-containing amino
acid. When heated to decomposition it emits
very toxic fumes of NOx and SOx.
純化方法
Crystallise L-methionine from aqueous EtOH. Also purify it by dissolving ~0.5g of amino acid in ~10mL of hot H2O, filtering, adjusting the pH to 5.8 with 5N HCl, collecting the solid after addition of ~20mL of EtOH. It is recrystallised by dissolving in H2O and adding EtOH. It sublimes at 197-208o/0.3mm with 99.8% recovery and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. [Milne & Peng J Am Chem Soc 79 647 1957, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2125-2152 1961, Beilstein 4 IV 3189.]
定義
本品は、次の化学式で表されるアミノ酸である。
化粧品の成分用途
ヘアコンディショニング剤、皮膚コンディショニング剤
L-メチオニン 上流と下流の製品情報
原材料
準備製品
