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52911-61-2

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52911-61-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52911-61-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,9,1 and 1 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 52911-61:
(7*5)+(6*2)+(5*9)+(4*1)+(3*1)+(2*6)+(1*1)=112
112 % 10 = 2
So 52911-61-2 is a valid CAS Registry Number.

52911-61-2Relevant articles and documents

Nitration of moderately deactivated arenes with nitrogen dioxide and molecular oxygen under neutral conditions. Zeolite-induced enhancement of regioselectivity and reversal of isomer ratios

Peng, Xinhua,Fukui, Naoyuki,Mizuta, Masayuki,Suzuki, Hitomi

, p. 2326 - 2335 (2007/10/03)

In the presence of zeolites, moderately deactivated arenes such as 1-nitronaphthalene, naphthonitriles, and methylated benzonitriles can be smoothly nitrated at room temperature by the combined action of nitrogen dioxide and molecular oxygen. The regioselectivity is considerably improved as compared with the conventional nitration methodology based on nitric and sulfuric acids. In some cases, the minor isomer became favoured to a significant extent, resulting in the reversal of ordinary isomer ratios of nitration products.

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