668-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 668-80-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,6 and 8 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 668-80:
(5*6)+(4*6)+(3*8)+(2*8)+(1*0)=94
94 % 10 = 4
So 668-80-4 is a valid CAS Registry Number.