91998-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91998-89-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,9,9 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91998-89:
(7*9)+(6*1)+(5*9)+(4*9)+(3*8)+(2*8)+(1*9)=199
199 % 10 = 9
So 91998-89-9 is a valid CAS Registry Number.