409109-56-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 409109-56-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,9,1,0 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 409109-56:
(8*4)+(7*0)+(6*9)+(5*1)+(4*0)+(3*9)+(2*5)+(1*6)=134
134 % 10 = 4
So 409109-56-4 is a valid CAS Registry Number.