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L-メチオニン 製品概要
化学名:L-メチオニン
英語化学名:L-Methionine
别名:l-alpha-amino-gamma-methylmercaptobutyricacid;l-alpha-amino-gamma-methylthiobutyricacid;L-gamma-Methylthio-alpha-aminobutyric acid;l-gamma-methylthio-alpha-aminobutyricacid;L-homocysteine,S-methyl-;Liquimeth;l-methionin;L-α-amino-γ-methylthiobutyricacid
CAS番号:63-68-3
分子式:C5H11NO2S
分子量:149.21
EINECS:200-562-9
カテゴリ情報:Amino Acids;Amino Acid Derivatives;Methionine [Met, M];Amino Acids and Derivatives;Amino Acids;Chiral Compound;fertilizer;Miscellaneous Compounds;Amino Acids & Derivatives;Sulfur & Selenium Compounds;amino
Mol File:63-68-3.mol
L-メチオニン
L-メチオニン 物理性質
融点 284 °C (dec.)(lit.)
比旋光度 23.25 º (c=2, 6N HCl)
沸点 393.91°C (estimate)
比重(密度) 1,34g/cm
屈折率 1.5216 (estimate)
貯蔵温度 Store at RT.
溶解性1 M HCl: 0.5 M at 20 °C, clear, colorless
酸解離定数(Pka)2.13(at 25℃)
外見 Solid
White
PH5-7 (10g/l, H2O, 20℃)
光学活性 (optical activity)[α]20/D +23.7±0.5°, c = 5% in 5 M HCl
水溶解度 Soluble
極大吸収波長 (λmax)λ: 260 nm Amax: 0.40
λ: 280 nm Amax: 0.05
Merck 14,5975
BRN 1722294
安定性:Stable. Incompatible with strong oxidizing agents.
CAS データベース63-68-3(CAS DataBase Reference)
NISTの化学物質情報L-Methionine(63-68-3)
EPAの化学物質情報L-Methionine(63-68-3)
安全性情報
Rフレーズ 33
Sフレーズ 24/25
WGK Germany 2
RTECS 番号PD0457000
10-23
TSCA Yes
HSコード 29304010
有毒物質データの63-68-3(Hazardous Substances Data)
MSDS Information
ProviderLanguage
L-Methionine English
SigmaAldrich English
ACROS English
ALFA English
L-メチオニン Usage And Synthesis
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
Tags:63-68-3