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メタンチオール

メタンチオール 化学構造式
74-93-1
CAS番号.
74-93-1
化学名:
メタンチオール
别名:
メタンチオール;メチルスルフヒドラート;メチルチオアルコール;メルカプトメタン;チオメタノール;メチルメルカプタン;チオメチルアルコール;チオメチルアルコル;チオメチルアルコ-ル;メチルメルカプタン標準液;メチルメルカプタン標準液 (1ΜG/ΜLベンゼン溶液);メチルメルカプタン, 2000 µg/mL in Toluene
英語化学名:
METHYL MERCAPTAN
英語别名:
CH3SH;C00409;4Q 1998;FEMA 2716;Methvtiolo;Methanthiol;Methaanthiol;MERCAPTAN C1;METHANETHIOL;THIOMETHANOL
CBNumber:
CB7106671
化学式:
CH4S
分子量:
48.11
MOL File:
74-93-1.mol

メタンチオール 物理性質

融点 :
−123 °C(lit.)
沸点 :
6 °C(lit.)
比重(密度) :
0.8665
蒸気密度:
1.66 (vs air)
蒸気圧:
1536 mm Hg ( 20 °C)
屈折率 :
1.4020 (estimate)
FEMA :
2716 | METHYL MERCAPTAN
闪点 :
<71℃
酸解離定数(Pka):
10.3(at 25℃)
外見 :
liquid
爆発限界(explosive limit):
21.8%
Merck :
13,5983
JECFA Number:
508
BRN :
1696840
暴露限界値:
TLV-TWA 0.5 ppm (~1.0 mg/m3 ) (ACGIH and MSHA); ceiling 10 ppm (OSHA); IDLH 400 ppm (NIOSH); the revised IDLH is 150 ppm in analogy to H2S.
安定性::
Stable. Highly flammable - note low flash point. Reacts vigorously or explosively with a wide variety of materials - consult a full MSDS data sheet before using. Incompatible with strong oxidizing agents, alkali and alkaline earth metals, epoxides, hydrazines, ketones, lead, mercury (II) oxide, azo- and diazo- compounds, copp
CAS データベース:
74-93-1(CAS DataBase Reference)
安全性情報
  • リスクと安全性に関する声明
  • 危険有害性情報のコード(GHS)
主な危険性  F+,T,N
Rフレーズ  12-23-50/53
Sフレーズ  16-25-60-61
RIDADR  UN 2037 2.3
WGK Germany  3
RTECS 番号 PB4375000
13-27
国連危険物分類  2.3
消防法 危-4-1-II
化審法 2-457
安衛法 有機溶剤中毒予防規則:第2種有機溶剤,57,57-2
PRTR法 1-300
毒劇物取締法 II
絵表示(GHS)
注意喚起語 Danger
危険有害性情報
コード 危険有害性情報 危険有害性クラス 区分 注意喚起語 シンボル P コード
H220 極めて可燃性/引火性の高いガス 可燃性/引火性ガス 1 危険 P210, P377, P381, P403
H280 加圧ガス;熱すると爆発のおそれ 高圧ガス 高圧ガス
液化ガス
溶解ガス
警告 P410+P403
H331 吸入すると有毒 急性毒性、吸入 3 危険 P261, P271, P304+P340, P311, P321,P403+P233, P405, P501
H410 長期的影響により水生生物に非常に強い毒性 水生環境有害性、慢性毒性 1 警告 P273, P391, P501
注意書き
P210 熱/火花/裸火/高温のもののような着火源から遠ざ けること。-禁煙。
P261 粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。
P273 環境への放出を避けること。
P311 医師に連絡すること。
P410+P403 日光から遮断し、換気の良い場所で保管するこ と。
P501 内容物/容器を...に廃棄すること。

メタンチオール 価格 もっと(3)

メーカー 製品番号 製品説明 CAS番号 包装 価格 更新時間 購入
富士フイルム和光純薬株式会社(wako) W01W0113-0617 メチルメルカプタン標準液 (1μg/μlベンゼン溶液)
Methyl Mercaptan Standard Solution (1 micro g/micro l Benzene Solution)
74-93-1 2mL×5 ¥6000 2018-12-26 購入
富士フイルム和光純薬株式会社(wako) W01ACSASTM-P-0091-03-10X メチルメルカプタン
Methyl mercaptan, 2000 ug/mL in Toluene
74-93-1 1mL ¥12900 2018-12-26 購入
関東化学株式会社(KANTO) 49879-16 メチルメルカプタン標準液
Methyl mercaptan standard solution
74-93-1 1mL ¥10500 2018-12-13 購入

メタンチオール 化学特性,用途語,生産方法

外観

無色澄明の液体

溶解性

水に難溶 (0.15g/100ml, 20℃), エタノール, エーテルに混和。エタノールと任意の割合で混和するが水に溶けない。

用途

大気中等メチルメルカプタン(メタンチオール)のGC分析用標準液。

用途

メチオニンの原料、医薬品、殺虫剤、プラスチック、メチルチオエーテル触媒活性調整剤、ガス付臭剤、有機合成中間体、反応促進剤

説明

Methanethiol (also known as methyl mercaptan) is a colorless gas with a smell like rotten cabbage. It is a natural substance found in the blood and brain of humans and other animals as well as plant tissues. It is disposed of through animal feces. It occurs naturally in certain foods, such as some nuts and cheese. It is also one of the main chemicals responsible for bad breath and the smell of flatus. The chemical formula for methanethiol is CH3SH; it is classified as a thiol. It is sometimes abbreviated as MeSH. It is very flammable.

化学的特性

Methyl mercaptan is a colorless gas or white liquid with a disagreeable odor like garlic or rotten cabbage. Shipped as a liquefied compressed gas. The odor threshold is 0.002 ppm.

化学的特性

colourless gas with a garlic-like or rotten cabbage-like smell

化学的特性

Methyl mercaptan has an objectionable odor of decomposing cabbage. May be prepared by heating an aqueous solution of potassium methyl sulfate and KHS; from sodium methyl sulfate and potassium sulfhydrate; also from methanol and hydrogen sulfide in the presence of a catalyst.

化学的特性

Methyl mercaptan has an objectionable odor of decomposing cabbage or garlic

天然物の起源

Methanethiol is released from decaying organic matter in marshes and is present in the natural gas of certain regions, in coal tar, and in some crude oils.
In surface seawater, methanethiol is the primary breakdown product of the algal metabolite dimethylsulfoniopropionate (DMSP). Marine bacteria appear to obtain most of their protein sulfur by the breakdown of DMSP and incorporation of methanethiol, despite the fact that methanethiol is present in seawater at much lower concentrations than sulfate (~0.3 nM vs. 28 mM). Bacteria in oxic and anoxic environments can also convert methanethiol to dimethyl sulfide (DMS), although most DMS in surface seawater is produced by a separate pathway. Both DMS and methanethiol can be used by certain microbes as substrates for methanogenesis in some anaerobic soils.
Methanethiol is a weak acid, with a pKa of ~10.4. This acidic property makes it reactive with dissolved metals in aqueous solutions. The environmental chemistry of these interactions in seawater or fresh water environments such as lakes has yet to be fully investigated.
A material safety data sheet (MSDS) lists methanethiol as a colorless, flammable gas with an extremely strong and repulsive smell. At very high concentrations it is highly toxic and affects the central nervous system. Its penetrating odor provides warning at dangerous concentrations. An odor threshold of 1 ppb has been reported. The United States OSHA Ceiling Limit is listed as 10 ppm.

使用

Synthesis, especially of methionine, jet fuel additives, fungicides; also as catalyst.

使用

Methanethiol is mainly used to produce methionine, which is used as a dietary component in poultry and animal feed. Methanethiol is also used in the plastics industry and as a precursor in the manufacture of pesticides. It is released as a by-product of wood pulping in pulp mills.
Methanethiol is also used for communication in mining operations . Releasing the substance into the ventilation system is generally the most efficient and reliable means to alert all workers of an emergency , and is referred to as "releasing the pest" ,This substance's strong odor alerts the miners to immediately go to a saferoom.
Since natural gas and propane are colorless and odorless, a small amount of methyl mercaptan or ethyl mercaptan is added to make it easy to detect a gas leak.

使用

Methanethiol is used in the manufacture ofpesticides and fungicides and as an intermediate in the manufacture of jet fuels (Watkinset al. 1989); it is added to natural gas to giveodor. It is used in the synthesis of methionine.

製造方法

Methanethiol is prepared commercially by the reaction of methanol with hydrogen sulfide gas over an acidic solid catalyst, such as alumina. It can be prepared by the reaction of methyl iodide with thiourea.

Aroma threshold values

Detection: 0.02 to 4 ppb. Aroma characteristics at 1.0%: vegetable oil, alliaceous, eggy, creamy with savory nuances

Taste threshold values

Taste characteristics at 1 ppm: sulfurous, alliaceous, creamy with a surface-ripened cheese top note and a clean, savory, meaty depth

空気と水の反応

Highly flammable. Reacts with water, steam or acids to produce toxic, flammable vapors [Lewis].

反応プロフィール

METHYL MERCAPTAN is a reducing agent--can react vigorously with oxidizing agents. Dangerous fire or explosion hazard when exposed to heat, flame, sparks or strong oxidizing agents (e.g., calcium hypochlorite). When heating to decomposition emits highly toxic fumes of oxides of sulfur [Lewis, 3rd ed., 1993, p. 862]. Violent reaction with mercury(II) oxide [Klason P., Ber., 1887, 20, p. 3410].

危険性

Flammable, dangerous fire risk. Explosive limits in air 3.9–21.8%. Strong irritant. Liver damage.

健康ハザード

Can cause death by respiratory paralysis. It is an eye and respiratory tract irritant. Exposure results in pulmonary edema and hepatic and renal damage.

健康ハザード

The acute toxicity of methanethiol is simi-lar to that of hydrogen sulfide. Inhalation ofthis gas can cause narcosis, headache, nau-sea, pulmonary irritation, and convulsions inhumans. Other symptoms noted are acutehemolytic anemia, methemoglobinemia, andcyanosis. In humans, several hours exposure to about 5 ppm concentration of thisgas can cause headache and nausea. Exposure to high concentrations can result inrespiratory paralysis and death. The 2-hour inhalation LC50 value in mice is within therange 650 mg/m3.
Shults et al. (1970) reported a case of ahuman death from overexposure to methane-thiol. The victim developed acute hemolyticanemia and methemoglobinemia and re-mainedindeepcomauntil deaththatoccurred28 days after the accident from emptying gascylinders.

火災危険

Combustion produces irritating sulfur dioxide. Flash back along vapor track may occur. Very dangerous when exposed to heat, flame, or oxidizers. On decomposition METHYL MERCAPTAN emits highly toxic fumes of sulfur oxides. METHYL MERCAPTAN will react with water, steam or acids to produce toxic and flammable vapors; and can react vigorously with oxidizing materials. Irritating sulfur dioxide is produced upon combustion. When heated to decomposition, METHYL MERCAPTAN emits highly toxic fumes and flammable vapors. Incompatible with mercuric oxide and oxidizing materials. Avoid direct sunlight, and areas of high fire hazards. Hazardous polymerization may not occur.

安全性プロファイル

Poison by inhalation. Mutation data reported. A common air contaminant. Very dangerous fire hazard when exposed to heat or flame; can react vigorously with oxidzing materials. Explosive in the form of vapor when exposed to heat or flame. Reacts with water, steam, or acids to produce toxic and flammable vapors. Violent reaction with mercury(II) oxide. To fight fire, use alcohol foam, CO2, dry chemical. Upon decomposition it emits highly toxic fumes of SOx.

Chemical Synthesis

By heating an aqueous solution of potassium methyl sulfate and KHS; from sodium methyl sulfate and potassium sulfhydrate; also from methanol and hydrogen sulfide in the presence of a catalyst

職業ばく露

Methyl mercaptan is used in methionine synthesis, and widely as an intermediate in pesticide manufacture. A foul-smelling odorant usually added to chemicals, including pesticides.

応急処置

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy. If frostbite has occurred, seek medical attention immediately; do NOT rub the affected areas or flush them with water. In order to prevent further tissue damage, do NOT attempt to remove frozen clothing from frostbitten areas. If frostbite has NOT occurred, immediately and thoroughly wash contaminated skin with soap and water.

輸送方法

UN1064 Methyl mercaptan, Hazard Class: 2.3; Labels: 2.3-Poisonous gas, 2.1-Flammable gas, Inhalation Hazard Zone C. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.

Asparagus

Methanethiol is a byproduct produced by the metabolism of asparagus. The ability to produce methanethiol in urine after eating asparagus was once thought to be a genetic trait. However recent research suggests that the peculiar odor is in fact produced by all humans after consuming asparagus, while the ability to detect it (methanethiol being one of many components in "asparagus pee") is in fact the genetic trait. The chemical components responsible for the change in the odor of urine show as soon as 15 minutes after eating asparagus.

不和合性

Violent reaction with strong oxidizers, bleaches, copper, nickel and their alloys; aluminum. Reacts with acids producing flammable and toxic hydrogen sulfide

廃棄物の処理

Return refillable compressed gas cylinders to supplier. Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. Incineration followed by effective scrubbing of the effluent gas.

メタンチオール 上流と下流の製品情報

原材料

準備製品


メタンチオール 生産企業

Global( 73)Suppliers
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Hubei Jusheng Technology Co.,Ltd.
86-188-71490254
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J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
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Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
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Beijing Ouhe Technology Co., Ltd +86-10-4006331231;+86-10-51280831;+86-10-82967028
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74-93-1(メタンチオール)キーワード:


  • 74-93-1
  • THIOMETHANOL
  • THIOMETHYL ALCOHOL
  • FEMA 2716
  • METHANETHIOL
  • MERCAPTAN C1
  • MERCAPTOMETHANE
  • METHYL MERCAPTAN
  • METHYL SULFHYDRATE
  • 4Q 1998
  • mercaptanmethylique(french)
  • Methaanthiol
  • METHANETHIOL, PRESSURE TIN WITH 100 ML
  • METHANETHIOL CYL. WITH 1.36 KG
  • METHANETHIOL, 99.5+%
  • METHANETHIOL PRESSURE TIN WITH 250 ML (N ET ~205 G)
  • methanethiol,methylmercaptan
  • 1-METHANETHIOL
  • Thiomethanol (I, T)
  • methyl hydrosulfide
  • METHYL MERCAPTAN 1% IN P.G.
  • METHYL MERCAPTAN 10% IN TRIACETIN
  • METHYL MERCAPTAN, NATURAL 1% IN CORN OIL
  • METHYL MERCAPTAN, NATURAL 1% IN NEOBEE
  • METHYL MERCAPTAN, NATURAL 1% IN P.G.
  • METHYL MERCAPTAN, NATURAL 10% IN BENZYL ALCOHOL
  • METHYL MERCAPTAN, NATURAL 5% IN ETHANOL
  • METHYL MERCAPTAN, NATURAL 5% IN NEOBEE
  • METHYL MERCAPTAN, NATURAL 5% IN P.G.
  • Mercaptan C1, Methyl mercaptan
  • Methyl Mercaptan Standard Solution
  • メタンチオール
  • メチルスルフヒドラート
  • メチルチオアルコール
  • メルカプトメタン
  • チオメタノール
  • メチルメルカプタン
  • チオメチルアルコール
  • チオメチルアルコル
  • チオメチルアルコ-ル
  • メチルメルカプタン標準液
  • メチルメルカプタン標準液 (1ΜG/ΜLベンゼン溶液)
  • メチルメルカプタン, 2000 µg/mL in Toluene
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