99389-80-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99389-80-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,3,8 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99389-80:
(7*9)+(6*9)+(5*3)+(4*8)+(3*9)+(2*8)+(1*0)=207
207 % 10 = 7
So 99389-80-7 is a valid CAS Registry Number.