409109-85-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 409109-85-9 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, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 409109-85:
(8*4)+(7*0)+(6*9)+(5*1)+(4*0)+(3*9)+(2*8)+(1*5)=139
139 % 10 = 9
So 409109-85-9 is a valid CAS Registry Number.