56516-61-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56516-61-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,5,1 and 6 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 56516-61:
(7*5)+(6*6)+(5*5)+(4*1)+(3*6)+(2*6)+(1*1)=131
131 % 10 = 1
So 56516-61-1 is a valid CAS Registry Number.