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63662-67-9

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63662-67-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 63662-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,3,6,6 and 2 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 63662-67:
(7*6)+(6*3)+(5*6)+(4*6)+(3*2)+(2*6)+(1*7)=139
139 % 10 = 9
So 63662-67-9 is a valid CAS Registry Number.

63662-67-9Relevant articles and documents

NITROIMIDAZOLES. PART V. CHLORONITROIMIDAZOLES FROM DINITROIMIDAZOLES. A REINVESTIGATION

Suwinski, Jerzy,Salwinska, Ewa,Watras, Jan,Widel, Maria

, p. 1261 - 1272 (2007/10/02)

5(4)-Chloro-4(5)-nitroimidazole and 2-chloro-4(5)-nitroimidazole or their N-methyl derivatives have been synthesized in at least two independent routes.In contrast to some former reports it has been established that from 2,4(or 5)-dinitroimidazoles only 2-chloro-4(or 5)-nitroimidazoles are obtained.In 4,5-dinitroimidazoles only a nitro group in the 5-position is replaced by a chlorine atom.Structures of the obtained compounds have been confirmed by analyses of physico-chemical data.

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