21742-02-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21742-02-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,4 and 2 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21742-02:
(7*2)+(6*1)+(5*7)+(4*4)+(3*2)+(2*0)+(1*2)=79
79 % 10 = 9
So 21742-02-9 is a valid CAS Registry Number.
21742-02-9Relevant academic research and scientific papers
One-pot synthesis of 3-amino-4-aryl- and 3-amino-4-hetarylfurazans
Sheremetev
, p. 1057 - 1059 (2007/10/03)
A "one pot" method for the synthesis of 3-amino-4-aryl- and 3-amino-4-hetarylfurazans from β-aryl- and 4-β-hetaryl-β-oxo acid esters was developed.
