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420-25-7

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420-25-7 Usage

Uses

1-Bromo-1-fluoroethylene can be used for gas treatment method for efficiently removing bromofluoroethylene.

Check Digit Verification of cas no

The CAS Registry Mumber 420-25-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,2 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 420-25:
(5*4)+(4*2)+(3*0)+(2*2)+(1*5)=37
37 % 10 = 7
So 420-25-7 is a valid CAS Registry Number.
InChI:InChI=1/C2H2BrF/c1-2(3)4/h1H2

420-25-7Relevant articles and documents

A method for the preparation of ethylene fluorine bromine

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Paragraph 0036; 0037, (2017/05/02)

The invention discloses a preparation method of 1-bromo-1-fluoroethylene.The preparation method comprises: two-stage bromination reaction and hydrogen bromide removal reaction; and has the characteristics of easily-available raw materials, low temperature of hot bromination reactions, high reaction yield, low cost, green, and environment-friendliness.

METHOD FOR PRODUCING 1,1-DIBROMO-1-FLUOROETHANE

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Paragraph 0089, (2016/08/29)

An object of the present invention is to provide a production method that makes it possible to produce 1,1-dibromo-1-fluoroethane easily and sustainably. The present invention provides a method for producing 1,1-dibromo-1-fluoroethane, the method comprising step A of reacting 1,1-dibromoethylene with hydrogen fluoride to obtain 1,1-dibromo-1-fluoroethane.

Low-temperature 19F NMR spectroscopy of 1-fluoro-1-lithioethenes - Stability, shifts and unexpected coupling constants

Kvicala, Jaroslav,Hrabal, Richard,Czernek, Jiri,Bartosova, Ivana,Paleta, Oldrich,Pelter, Andrew

, p. 211 - 218 (2007/10/03)

Half-lives and fluorine atom shifts of stabilized 1-fluoro-l-lithioethenes bearing hydrogen, fluorine, phenyl, and/or dimethylphenylsilyl groups in the β-positions have been determined by a low-temperature 19F NMR spectroscopy. Some 1-fluoro-1-lithioethenes displayed an exceptionally low value of the trans-3JFF coupling constant. Stereoselectivity of carbenoid formation, as well as an effect of configuration on the stability is discussed.

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