6495-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6495-20-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,9 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6495-20:
(6*6)+(5*4)+(4*9)+(3*5)+(2*2)+(1*0)=111
111 % 10 = 1
So 6495-20-1 is a valid CAS Registry Number.