74809-03-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74809-03-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,8,0 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74809-03:
(7*7)+(6*4)+(5*8)+(4*0)+(3*9)+(2*0)+(1*3)=143
143 % 10 = 3
So 74809-03-3 is a valid CAS Registry Number.
74809-03-3Relevant articles and documents
6-Oxo- and 6-Thioxoverdazyls
Neugebauer, Franz A.,Fischer, Hans,Siegel, Rolf
, p. 815 - 823 (2007/10/02)
A series of persistent 6-oxo- (4a-p) and 6-thioxoverdazyls (5a-g) could be obtained by dehydrogenation of corresponding 1,4,5,6-tetrahydro-1,2,4,5-tetrazin-3(2H)-ones (2a-p) and thiones (3a-g).This reaction can also be used for the preparation of diradica