717815-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 717815-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,1,7,8,1 and 5 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 717815-89:
(8*7)+(7*1)+(6*7)+(5*8)+(4*1)+(3*5)+(2*8)+(1*9)=189
189 % 10 = 9
So 717815-89-9 is a valid CAS Registry Number.