99989-78-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99989-78-3 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, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 99989-78:
(7*9)+(6*9)+(5*9)+(4*8)+(3*9)+(2*7)+(1*8)=243
243 % 10 = 3
So 99989-78-3 is a valid CAS Registry Number.