20-73-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20-73-5 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 2 and 0 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20-73:
(4*2)+(3*0)+(2*7)+(1*3)=25
25 % 10 = 5
So 20-73-5 is a valid CAS Registry Number.