91731-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91731-71-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,3 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91731-71:
(7*9)+(6*1)+(5*7)+(4*3)+(3*1)+(2*7)+(1*1)=134
134 % 10 = 4
So 91731-71-4 is a valid CAS Registry Number.
91731-71-4Relevant articles and documents
REACTION OF DIAZOMETHANE WITH HYDROXYIMINOMALONANILIDES
Prosyanik, A. V.,Zorin, Ya. Z.,Solov'ev, E. L.
, p. 1353 - 1360 (2007/10/02)
The structures of the yellow and white crystalline modifications of para-substituted hydroxyiminomalonanilides and their reaction with diazomethane under various conditions, leading to the corresponding nitrones and oxime O-ethers, were investigated.Proba