408309-55-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 408309-55-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,8,3,0 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 408309-55:
(8*4)+(7*0)+(6*8)+(5*3)+(4*0)+(3*9)+(2*5)+(1*5)=137
137 % 10 = 7
So 408309-55-7 is a valid CAS Registry Number.