219904-40-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219904-40-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,0 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219904-40:
(8*2)+(7*1)+(6*9)+(5*9)+(4*0)+(3*4)+(2*4)+(1*0)=142
142 % 10 = 2
So 219904-40-2 is a valid CAS Registry Number.
219904-40-2Relevant articles and documents
Equilibrium of acyl transfer between pyridine N-oxides and their acylonium salts
Rubachenko,Schroeder,Chotii,Kovalenko,Red'ko,Lenska
, p. 1241 - 1246 (2008/12/22)
Transfer of acyl groups from N-acyloxypyridinium salts to pyridine N-oxides in acetonitrile was studied. The equilibrium constants of acyl exchange were determined. These quantities vary in the range covering eight orders of magnitude, depending on the st
