772-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 772-20-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,7 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 772-20:
(5*7)+(4*7)+(3*2)+(2*2)+(1*0)=73
73 % 10 = 3
So 772-20-3 is a valid CAS Registry Number.