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55852-04-5

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55852-04-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55852-04-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,8,5 and 2 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 55852-04:
(7*5)+(6*5)+(5*8)+(4*5)+(3*2)+(2*0)+(1*4)=135
135 % 10 = 5
So 55852-04-5 is a valid CAS Registry Number.

55852-04-5Downstream Products

55852-04-5Relevant articles and documents

Reaction of diethylaminosulfur trifluoride with diols

Shellhamer, Dale F.,Anstine, D. Timothy,Gallego, Kelly M.,Ganesh, Brian R.,Hanson, Aaron A.,et al.

, p. 861 - 866 (2007/10/02)

Diethylaminosulfur trifluoride (DAST) reacts with dialcohols to give difluorides, sulfite esters or cyclic ethers depending on the number of carbons separating the two alcohol groups.Vicinal and 1,3-diols give large amounts of sulfite ester products while butane-1,4-diol gives almost exclusively the cyclic ether tetrahydrofuran.Terminal dialcohols longer than four carbons give primarily difluoride products.Semiempirical calculations indicate a preference for cyclic intermediates when four or less carbons separate the two alcohol moieties.These cyclic intermediates lead directly to the cyclic ethers and sulfite ester products.

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