717840-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 717840-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,1,7,8,4 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 717840-40:
(8*7)+(7*1)+(6*7)+(5*8)+(4*4)+(3*0)+(2*4)+(1*0)=169
169 % 10 = 9
So 717840-40-9 is a valid CAS Registry Number.