20423-20-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20423-20-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,2 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20423-20:
(7*2)+(6*0)+(5*4)+(4*2)+(3*3)+(2*2)+(1*0)=55
55 % 10 = 5
So 20423-20-5 is a valid CAS Registry Number.