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772339-81-8

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772339-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 772339-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,7,2,3,3 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 772339-81:
(8*7)+(7*7)+(6*2)+(5*3)+(4*3)+(3*9)+(2*8)+(1*1)=188
188 % 10 = 8
So 772339-81-8 is a valid CAS Registry Number.

772339-81-8Relevant articles and documents

Preparation of α, α-difluoroalkanesulfonic acids

Prakash, G.K. Surya,Hu, Jinbo,Simon, Jurgen,Bellew, Donald R.,Olah, George A.

, p. 595 - 601 (2004)

Chlorodifluoromethanesulfonic acid (1) was prepared using a new procedure starting from perchloromercaptan, which is readily obtained from chlorination of CS2. Modified Swarts reaction transformed N, N-diethyl trichloromethanesulfenamide into N, N-diethyl chlorodifluoromethanesulfenamide, and the latter species was further oxidized and hydrolyzed into chlorodifluoromethanesulfonic acid. The preparations of other two new α,α-difluoroalkanesulfonic acids, phenyl difluoromethanesulfonic acid (2) and 2-phenyl-1,1,2,2, -tetrafluoroethanesulfonic acid (3), are also disclosed. The acids 2 and 3 are stable in the forms of sodium (lithium) salts or in aqueous solutions; however, the pure forms of 2 and 3 can readily undergo defluorinations. 1-3 and their salts have potential applications as superacid catalysts and lithium battery electrolytes.

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