99983-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99983-80-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,8 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99983-80:
(7*9)+(6*9)+(5*9)+(4*8)+(3*3)+(2*8)+(1*0)=219
219 % 10 = 9
So 99983-80-9 is a valid CAS Registry Number.