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221223-57-0

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221223-57-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221223-57-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,2 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221223-57:
(8*2)+(7*2)+(6*1)+(5*2)+(4*2)+(3*3)+(2*5)+(1*7)=80
80 % 10 = 0
So 221223-57-0 is a valid CAS Registry Number.

221223-57-0Relevant articles and documents

Synthesis of 6,8-substituted derivatives of imidazo[5,1-c][1,2,4]triazines and 1,4-dihydroimidazo[5,1-c][1,2,4]triazin-4-ones

Bezmaternykh,Mokrushin,Pospelova,El'tsov

, p. 702 - 711 (1998)

The cyclization of imidazolylhydrazines, synthesized from 5-diazoimidazoles and cyanoacetic acid derivatives, to 4-aminoimidazo[5,1-c][1,2,4]triazines and imidazo[5,1-c][1,2,4]triazin-4-ones has been studied. It was established that electron-withdrawing s

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