54209-17-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54209-17-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,2,0 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 54209-17:
(7*5)+(6*4)+(5*2)+(4*0)+(3*9)+(2*1)+(1*7)=105
105 % 10 = 5
So 54209-17-5 is a valid CAS Registry Number.