4408-20-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4408-20-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,0 and 8 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4408-20:
(6*4)+(5*4)+(4*0)+(3*8)+(2*2)+(1*0)=72
72 % 10 = 2
So 4408-20-2 is a valid CAS Registry Number.