74809-05-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74809-05-5 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 5 respectively.
Calculate Digit Verification of CAS Registry Number 74809-05:
(7*7)+(6*4)+(5*8)+(4*0)+(3*9)+(2*0)+(1*5)=145
145 % 10 = 5
So 74809-05-5 is a valid CAS Registry Number.
74809-05-5Relevant 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
