717909-84-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 717909-84-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,1,7,9,0 and 9 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 717909-84:
(8*7)+(7*1)+(6*7)+(5*9)+(4*0)+(3*9)+(2*8)+(1*4)=197
197 % 10 = 7
So 717909-84-7 is a valid CAS Registry Number.