20500-72-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20500-72-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,0 and 0 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20500-72:
(7*2)+(6*0)+(5*5)+(4*0)+(3*0)+(2*7)+(1*2)=55
55 % 10 = 5
So 20500-72-5 is a valid CAS Registry Number.