81831-80-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81831-80-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,3 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81831-80:
(7*8)+(6*1)+(5*8)+(4*3)+(3*1)+(2*8)+(1*0)=133
133 % 10 = 3
So 81831-80-3 is a valid CAS Registry Number.