89998-56-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89998-56-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,9 and 8 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 89998-56:
(7*8)+(6*9)+(5*9)+(4*9)+(3*8)+(2*5)+(1*6)=231
231 % 10 = 1
So 89998-56-1 is a valid CAS Registry Number.