77798-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77798-53-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,7,9 and 8 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 77798-53:
(7*7)+(6*7)+(5*7)+(4*9)+(3*8)+(2*5)+(1*3)=199
199 % 10 = 9
So 77798-53-9 is a valid CAS Registry Number.
77798-53-9Relevant articles and documents
Reactions with Diazoazoles, VIII. - Syntheses of Azolo-1,2,3,5-tetrazin-4(3H)-ones
Ege, Guenter,Gilbert, Karlheinz,Maurer, Kurt
, p. 1375 - 1396 (2007/10/02)
Azolo-1,2,3,5-tetrazin-4(3H)-ones 4 and 5 are formed by cycloaddition reactions of α-diazoazoles 2 with aryl or alkyl isocyanates 3a-p, respectively, as well as with diisocyanates 3q,r (Method A).Alternative syntheses for 4 are presented by diazoti
