42320-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42320-80-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,3,2 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 42320-80:
(7*4)+(6*2)+(5*3)+(4*2)+(3*0)+(2*8)+(1*0)=79
79 % 10 = 9
So 42320-80-9 is a valid CAS Registry Number.