56173-26-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56173-26-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,1,7 and 3 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 56173-26:
(7*5)+(6*6)+(5*1)+(4*7)+(3*3)+(2*2)+(1*6)=123
123 % 10 = 3
So 56173-26-3 is a valid CAS Registry Number.
56173-26-3Relevant articles and documents
Activated polycondensation in synthesis of polyamidobenzimidazoles
Mognonov,Mazurevskaya,Ul'zetueva,Izyneev
, p. 1066 - 1069 (2007/10/03)
Formation of polyaminoimides by activated copolycondensation of bis-p-nitrophenyl esters of aliphatic and aromatic dicarboxylic acids with aromatic tetraamines and ε-caprolactam in N-methylpyrrolidone was studied. The optimal synthesis conditions were det