641-61-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641-61-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,4 and 1 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 641-61:
(5*6)+(4*4)+(3*1)+(2*6)+(1*1)=62
62 % 10 = 2
So 641-61-2 is a valid CAS Registry Number.