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27701-73-1

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27701-73-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 27701-73-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,7,0 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 27701-73:
(7*2)+(6*7)+(5*7)+(4*0)+(3*1)+(2*7)+(1*3)=111
111 % 10 = 1
So 27701-73-1 is a valid CAS Registry Number.

27701-73-1Relevant articles and documents

Regioselective Nitration of inactive 4,4-Dibromobiphenyl with Nitrogen Dioxide and Molecular Oxygen over Zeolites: An efficient preparation of 4,4'-Dibromo-2-nitrobiphenyl

Wang, Wei,Peng, Xinhua,Chen, Nan

, p. 72 - 75 (2014/03/21)

In the presence of zeolites, 4,4'-dibromobiphenyl could be region-selectively nitrated by the action of nitrogen dioxide and molecular oxygen. The ratio of 4,4'-dibromo-2-nitrobiphenyl to 4,4'-dibromo-3- nitrobiphenyl could reach 14 in a high yield of 90%. Zeolites could be easily regenerated by heating and reused four times to give the results similar to those obtained with fresh catalyst. Compared with the classic nitration method, no nitric acid and sulfuric acid were used, which suggested that the method was an environmentally economic process.

Improved regioselective mononitration of o-xylene over HBEA-500 zeolite catalyst

Shi, Chun J.,Tai, Yan F.,Liu, Hong T.

, p. 3485 - 3487 (2014/01/06)

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