ChemicalBook
Chinese english Germany Korea

ケテン

ケテン 化学構造式
463-51-4
CAS番号.
463-51-4
化学名:
ケテン
别名:
エテン-1-オン;カルボメテン;ケテン;エテノン
英語化学名:
ketene
英語别名:
Keten;ethenone;carbometene;Ethen-1-one;Carbomethene;ketene ISO 9001:2015 REACH
CBNumber:
CB9934768
化学式:
C2H2O
分子量:
42.04
MOL File:
463-51-4.mol

ケテン 物理性質

融点 :
-150°
沸点 :
bp -56°
比重(密度) :
0.6600
屈折率 :
1.3040 (estimate)
外見 :
Gas
暴露限界値:
TLV-TWA 0.9 mg/m3 (0.5 ppm); STEL 3.0 mg/m3 (1.5 ppm) (ACGIH); IDLH 50 ppm (NIOSH).
EPAの化学物質情報:
Ketene (463-51-4)

安全性情報

RIDADR  1955
国連危険物分類  2.3
有毒物質データの 463-51-4(Hazardous Substances Data)

ケテン 価格

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

ケテン 化学特性,用途語,生産方法

用途

有機合成原料

化学的特性

Colorless gas with a sharp penetrating odor;liquefies at -56°C (-68.8°F); solidifies at-151°C (-239.8°F); soluble in alcohol andacetone, decomposed by water.

使用

Organic chemical syntheses; conversion of higher acids into their anhydrides; for acetylation in the manufacture of cellulose acetate and aspirin

使用

For the conversion of higher acids into their anhydrides; for acetylation in the manufacture of cellulose acetate and aspirin.

使用

Ketene is used as an acetylating agent inthe production of cellulose acetate, aspirin,acetic anhydride, and in various organicsyntheses.

調製方法

Ketene may be prepared also by pyrolysis of acetic anhydride or phenyl acetate or diketene. Other sources are quite unsatisfactory from a standpoint of yield. Small quantities may be made conveniently by heating acetone in a “ketene lamp.” This is a glass apparatus containing a Nichrome filament, heated electrically to red heat. Larger amounts are made by passing acetone or acetic acid through a tube at 700 °C. A very brief contact time is required, so that much of the acetone is undecomposed and has to be condensed and recycled. Also, it is imperative that the reaction tube be of inert material such as porcelain, glass, quartz, copper or stainless steel. A copper tube, if used, should be protected from oxidation by an iron sheath. Inert packing may be used (glass, vanadium pentoxide, porcelain), but just as good yields are obtained with empty tubes. No catalyst is known which accelerates this decomposition at significantly lower temperatures.

健康ハザード

Ketene is a highly toxic gas. It causes severeirritation to the eyes, nose, throat, and skin.Exposure to 10–15 ppm for several minutescan injure the respiratory tract. It causespulmonary edema. A 30-minute exposure to23 ppm was lethal to mice and a 10-minuteexposure to 200 and 750 ppm caused deathto monkeys and cats.

火災危険

Ketene in its gaseous state should be flammable and explosive in air. The pure compound, however, polymerizes readily and cannot be stored as a gas. Its flash point and LEL and UEL values are not reported. It can react violently with oxidizers and many organic compounds. Its small size and the olefinic unsaturation impart further reactivity to the molecule.

純化方法

Ketene is prepared by pyrolysis of acetic anhydride. Purify it by passing through a trap at -75o and collecting in a liquid-nitrogen-cooled trap. Ethylene is removed by evacuating the ethylene in an isopentane-liquid-nitrogen slush pack at -160o. Store it at room temperature in a suitable container in the dark or better at -80o, but do not store it under pressure as it may EXPLODE. It is a strong IRRITANT when inhaled and is as poisonous as phosgene. See diketene in “Heterocyclic Compounds”, Chapter 4. [Hurd Org Synth Coll Vol I 330 1941, Andreades & Carlson Org Synth Coll Vol V 679 1973.]

ケテン 上流と下流の製品情報

原材料

準備製品


ケテン 生産企業

Global( 8)Suppliers
名前 電話番号 ファックス番号 電子メール 国籍 製品カタログ 優位度
Dideu Industries Group Limited
029-88380327
Service@dideu.com CHINA 29986 58
ChemStrong Scientific Co.,Ltd 15920483169 0755-66853366-
sales@chem-strong.com China 26597 56
Chizhou Kailong Import and Export Trade Co., Ltd. Please Email
- xg01_gj@163.com China 9550 50

463-51-4(ケテン)キーワード:


  • 463-51-4
  • Carbomethene
  • ethenone
  • Keten
  • Ethen-1-one
  • carbometene
  • ketene ISO 9001:2015 REACH
  • エテン-1-オン
  • カルボメテン
  • ケテン
  • エテノン
Copyright 2017 © ChemicalBook. All rights reserved