21741-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21741-99-1 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 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21741-99:
(7*2)+(6*1)+(5*7)+(4*4)+(3*1)+(2*9)+(1*9)=101
101 % 10 = 1
So 21741-99-1 is a valid CAS Registry Number.
21741-99-1Relevant articles and documents
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.