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463-51-4

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Product FOB Price Min.Order Supply Ability Supplier
ketene
Cas No: 463-51-4
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
Large Stock 99.0% ketene 463-51-4 Producer
Cas No: 463-51-4
USD $ 0.1-0.1 / Gram 1 Gram 100 Metric Ton/Year Xi'an Xszo Chem Co., Ltd. Contact Supplier
463-51-4 Ethenone
Cas No: 463-51-4
USD $ 40.0-50.0 / Gram 1 Gram 1000 Metric Ton/Day WUHAN MULEI NEW MATERIAL CO., LTD Contact Supplier
Ethenone
Cas No: 463-51-4
No Data No Data 10000 Metric Ton/Month Henan Wentao Chemical Product Co., Ltd. Contact Supplier
Ethenone
Cas No: 463-51-4
No Data 1 Kilogram 1 Metric Ton/Day Shandong Hanjiang Chemical Co., Ltd. Contact Supplier
Ethenone cas:463-51-4
Cas No: 463-51-4
USD $ 100.0-150.0 / Kilogram 1 Kilogram 1000 Metric Ton/Day Wuhan Monad Medicine Tech Co.,LTD Contact Supplier
ketene
Cas No: 463-51-4
USD $ 100.0-100.0 / Kilogram 1 Kilogram 10000 Kilogram/Day Metric Ton/Day Zibo Hangyu Import&Export Co., Ltd Contact Supplier
ketene/463-51-4
Cas No: 463-51-4
No Data No Data No Data Zhengzhou Meitong Pharmaceutical Technology Co., Ltd. Contact Supplier
ketene CAS NO.463-51-4
Cas No: 463-51-4
No Data No Data No Data Jilin haofei import and export trade Co.,Ltd Contact Supplier
Ethenone
Cas No: 463-51-4
No Data No Data No Data HANGZHOU CLAP TECHNOLOGY CO,.LTD Contact Supplier

463-51-4 Usage

Chemical Properties

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.

Uses

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

Uses

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

Production Methods

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.

Uses

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

Purification Methods

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.]

Health Hazard

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.

Fire Hazard

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.
InChI:InChI=1/C2H2O/c1-2-3/h1H2

463-51-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name ethenone

1.2 Other means of identification

Product number -
Other names Ethen-1-one

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:463-51-4 SDS

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