50-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 50-20-4 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 5 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 50-20:
(4*5)+(3*0)+(2*2)+(1*0)=24
24 % 10 = 4
So 50-20-4 is a valid CAS Registry Number.