28209-54-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28209-54-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,2,0 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 28209-54:
(7*2)+(6*8)+(5*2)+(4*0)+(3*9)+(2*5)+(1*4)=113
113 % 10 = 3
So 28209-54-3 is a valid CAS Registry Number.