21614-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21614-53-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,1 and 4 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21614-53:
(7*2)+(6*1)+(5*6)+(4*1)+(3*4)+(2*5)+(1*3)=79
79 % 10 = 9
So 21614-53-9 is a valid CAS Registry Number.