720-22-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 720-22-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,2 and 0 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 720-22:
(5*7)+(4*2)+(3*0)+(2*2)+(1*2)=49
49 % 10 = 9
So 720-22-9 is a valid CAS Registry Number.