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87345-61-7

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87345-61-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87345-61-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,3,4 and 5 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 87345-61:
(7*8)+(6*7)+(5*3)+(4*4)+(3*5)+(2*6)+(1*1)=157
157 % 10 = 7
So 87345-61-7 is a valid CAS Registry Number.

87345-61-7Relevant articles and documents

SYNTHESIS OF SYMMETRICAL TEREPHTHALOYL DERIVATIVES OF 2-(p-AMINOPHENYL)-5-AMINOBENZIMIDAZOLES - MONOMERS FOR THE PREPARATION OF POLYAMIDES

Gel'mont, M. M.,Akulin, Yu. I.,Strelets, B. Kh.,Efros, L. S.

, p. 786 - 792 (2007/10/02)

Various methods for the synthesis of symetrical terephthaloyl derivatives of 2-(p-aminophenyl)-5-aminobenzimidazoles were studied.Acylation of the isomeric aminonitro-2-phenylbenzimidazoles obtained in this research with subsequent reduction of the nitro groups was found to be the most preparatively convenient method.

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