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1885-09-2

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1885-09-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1885-09-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,8 and 5 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1885-09:
(6*1)+(5*8)+(4*8)+(3*5)+(2*0)+(1*9)=102
102 % 10 = 2
So 1885-09-2 is a valid CAS Registry Number.

1885-09-2Downstream Products

1885-09-2Relevant articles and documents

Perfluoro- and Polyfluorosulfonic Acids. 21. Synthesis of Difluoromethyl Esters Using Fluorosulfonyldifluoroacetic Acid as a Difluorocarbene Precursor

Chen, Qing-Yun,Wu, Sheng-Wen

, p. 3023 - 3027 (2007/10/02)

Difluoromethyl alkanoates 5 and fluorinated and nonfluorinated alkanesulfonates 9 were synthesized in moderate yields by the reaction of alkali metal salts of acids with fluorosulfonyldifluoroacetic acid (3) in acetonitrile under mild conditions.The presumed intermediate anion FO2SCF2CO2- generates CF2: by elimination of SO2, CO2, and F-.The esters are formed by insertion of CF2: into the O-H of the acid, whereas HCF3 is formed by the competing capture of F-.Organic acids can be used indirectly in the reaction in the presence of inorganic salts such as Na2SO4 and KCl, with comparable yields of difluoromethyl esters.

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