99989-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99989-18-1 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 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 99989-18:
(7*9)+(6*9)+(5*9)+(4*8)+(3*9)+(2*1)+(1*8)=231
231 % 10 = 1
So 99989-18-1 is a valid CAS Registry Number.