40809-56-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40809-56-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,8,0 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 40809-56:
(7*4)+(6*0)+(5*8)+(4*0)+(3*9)+(2*5)+(1*6)=111
111 % 10 = 1
So 40809-56-1 is a valid CAS Registry Number.