89909-09-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89909-09-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,0 and 9 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 89909-09:
(7*8)+(6*9)+(5*9)+(4*0)+(3*9)+(2*0)+(1*9)=191
191 % 10 = 1
So 89909-09-1 is a valid CAS Registry Number.