71221-64-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71221-64-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,2,2 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 71221-64:
(7*7)+(6*1)+(5*2)+(4*2)+(3*1)+(2*6)+(1*4)=92
92 % 10 = 2
So 71221-64-2 is a valid CAS Registry Number.