256-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256-80-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,5 and 6 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 256-80:
(5*2)+(4*5)+(3*6)+(2*8)+(1*0)=64
64 % 10 = 4
So 256-80-4 is a valid CAS Registry Number.