40016-17-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40016-17-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,0,1 and 6 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 40016-17:
(7*4)+(6*0)+(5*0)+(4*1)+(3*6)+(2*1)+(1*7)=59
59 % 10 = 9
So 40016-17-9 is a valid CAS Registry Number.