81-43-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81-43-6 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 1 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81-43:
(4*8)+(3*1)+(2*4)+(1*3)=46
46 % 10 = 6
So 81-43-6 is a valid CAS Registry Number.