1998-89-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1998-89-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,9 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1998-89:
(6*1)+(5*9)+(4*9)+(3*8)+(2*8)+(1*9)=136
136 % 10 = 6
So 1998-89-6 is a valid CAS Registry Number.