147021-92-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 147021-92-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,7,0,2 and 1 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 147021-92:
(8*1)+(7*4)+(6*7)+(5*0)+(4*2)+(3*1)+(2*9)+(1*2)=109
109 % 10 = 9
So 147021-92-9 is a valid CAS Registry Number.
147021-92-9Relevant articles and documents
A useful methodology for the synthesis of 2-methyl-4-nitrobenzimidazoles
Tian,Grivas
, p. 1283 - 1286 (2007/10/02)
Cyclocondensation of 3-nitro-1,2-benzenediamines 2 with 2,4-pentanedione provides a convenient route for the preparation of 2-methyl-4-nitrobenzimidazoles 3. A discrepancy in the literature regarding the 5-chloro-, 5-methoxy- and 5-methyl derivatives of the title compounds is discussed.
