メチルスルフィド 化學特性,用途語,生産方法
外観
無色澄明の液體
溶解性
水に難溶 (0.6g/100ml)。エタノール及びアセトンに溶け、水に溶けない。
解説
C2H6S(62.14)．(CH3)2S．ジメチルスルフィドは，硫化ジメチルともいう．ヨウ化メチルと硫化カリウムとの反応で得られる．不快臭をもつ液體．融點－83 ℃，沸點37.34 ℃．d204 0.848．n20D 1.435．水に不溶，エタノール，エーテルに可溶．酸化によりDMSOを與える．多くの精油，ノリ，ワサビなどの食品にも含まれており，少量をフレーバーに使用する．悪臭防止法で指定されている悪臭物質．森北出版「化學辭典（第2版）
用途
コーヒー、チョコレート、ココア系等の食品香料、LPガス著臭剤
説明
Dimethyl sulfide, a sulfur ether compound, shares structural and property similarities with dimethyl ether. It is a colorless, volatile liquid that exhibits a distinct seafood-like odor. This compound is naturally generated through protein decomposition and serves as one of the culprits responsible for the fishy scent often associated with seafood.
化學的特性
Methyl sulfide, also known as Dimethyl sulfide, is a clear colorless volatile liquid that has an intense, unpleasant odor, wild radish, cabbage-like. It can be tolerated as a green vegetable note only at very low levels (0.1 - 3.0 ppm). Dimethyl sulfide is soluble in ethanol and ether, but insoluble in water.
使用
Dimethyl sulfide is used as a displaceable ligand in chloro(dimethyl sulfide)gold(I) and other coordination compounds, as a reducing agent in ozonolysis reactions as well as a food flavoring component. Further, it is utilized for the preparation of dimethyl sulfoxide, which is a common and important industrial solvent. It finds application in the petroleum industry.
製造方法
By reaction of potassium sulfide with methyl chloride in methanol solution; from potassium methyl sulfate and potassium sulfide
定義
ChEBI: Dimethyl sulfide is a methyl sulfide in which the sulfur atom is substituted by two methyl groups. It is produced naturally by some marine algae. It has a role as a bacterial xenobiotic metabolite, a marine metabolite, an EC 3.5.1.4 (amidase) inhibitor, an algal metabolite and an Escherichia coli metabolite.
一般的な説明
A clear colorless to straw colored liquid with a disagreeable odor. Flash point less than 0°F. Less dense than water and slightly soluble in water. Vapors are heavier than air.
空気と水の反応
Highly flammable. Slightly soluble in water.
反応プロフィール
Organosulfides, such as Dimethyl sulfide, are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Dimethyl sulfide rapidly decomposes dibenzoyl peroxide explosively in the absence of solvent, [J. Org. Chem., 1972, 37, 2885]. The sulfide also decomposes xenon difluoride explosively at ambient temps, [J, Chem Soc., 1984, 2827]. Interaction of Dimethyl sulfide and oxygen is explosive at 210°C and above, [Atmos. Environ., 1967, 1, 491-497]. A delayed explosion occurred in a system containing nitric acid, Dimethyl sulfide, and 1, 4-dioxane, even with cooling with liquid nitrogen, [Chem. Abs., 1972, 76, 13515].
健康ハザード
Inhalation causes moderate irritation of upper respiratory system. Contact of liquid with eyes causes moderate irritation. Repeated contact with skin may extract oils and result in irritation. Ingestion causes nausea and irritation of mouth and stomach.
安全性プロファイル
Poison by inhalation.
Moderately toxic by ingestion. A skin and
severe eye irritant. A very dangerous fire
hazard when exposed to heat or flame.
Explosive in the form of vapor when
exposed to heat or flame. Can react
vigorously with oxidizing materials. To fight
fire, use CO2, dry chemical. When heated to
decomposition it emits highly toxic fumes of
SOx and may explode. See also SULFIDES.
応急処置
If Dimethyl sulfide gets into the eyes, remove anycontact lenses at once and irrigate immediately for15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.
純化方法
Purify dimethyl sulfide via the Hg(II) chloride complex by dissolving 1 mole of Hg(II)Cl2 in 1250mL of EtOH and slowly adding the boiling alcoholic solution of Me2S to give the right ratio for 2(CH3)2S.3HgCl2. After recrystallisation of the complex to constant melting point, 500g of complex is heated with 250mL conc HCl in 750mL of water. The sulfide is separated, washed with water, and dried with CaCl2 and CaSO4. Finally, it is distilled under reduced pressure from sodium. Precautions should be taken (efficient fume hood) because of its very UNPLEASANT ODOUR.[Beilstein 1 IV 1275.]
メチルスルフィド 上流と下流の製品情報
原材料
準備製品
Ethyl 5-[3-(4,6-dimethoxy pyrimidyl-2-yl)ureido]methylpyrazolyl-4-carboxylic ester
クロロチオりん酸ジメチル
ジチオりん酸O,O-ジメチルS-(N-メチルカルバモイルメチル)
プロポキシカルバゾンナトリウム
2,5-ビス(ベンゾオキサゾール-2-イル)チオフェン
プロピオン酸フルチカゾン
パズフロキサシン
3-フランカルボン酸 エチル
ジチオりん酸O,O-ジエチルS-[(4-クロロフェニルチオ)メチル]
チオりん酸ジメチル=4-ニトロフェニル
ジチオりん酸O,O-ジメチルS-[(5-メトキシ-2-オキソ-1,3,4-チアジアゾール-3(2H)-イル)メチル]
2-(メチルチオ)-6-アミノピリミジン-4-オール
N-アセチルホスホルアミドチオ酸O,S-ジメチル
ホスホロチオ酸O,O-ジメチルO-(3-メチル-4-ニトロフェニル)
ラニチジン
アザメチホス
N,N-ジメチルチオカルバミン酸S-(4-フェノキシブチル)
チオりん酸O,O-ジメチルS-(N-メチルカルバモイルメチル)
ミフェプリストン
ケトロラク
2-[エトキシ(イソプロピルアミノ)チオホスフィニルオキシ]安息香酸イソプロピル
ホスメット
4-メチル-4-メチルチオ-2-ペンタノン
5-カルボキシシトシン
(ジメトキシチオホスフィノイルチオ)酢酸メチル
チオりん酸O,O-ジメチルO-[p-シアノフェニル]
フィプロニル
4-AMINO-2-(METHYLTHIO)PYRIMIDINE-5-CARBOXYLIC ACID
ジメチルスルホキシド
ジチオりん酸O,O-ジメチルS-アンモニウム
3-フランメタノール
4-アミノ-2-(メチルチオ)-5-ピリミジンカルボン酸エチルエステル
マラソン剤
WL 108477
フロセキナン
クロロメチル メチル スルフィド
ジチオりん酸水素O,O-ジメチル
5-(ヒドロキシメチル)シトシン
アミノグアニジニウムスルファート