81815-15-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81815-15-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,1 and 5 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81815-15:
(7*8)+(6*1)+(5*8)+(4*1)+(3*5)+(2*1)+(1*5)=128
128 % 10 = 8
So 81815-15-8 is a valid CAS Registry Number.