5809-28-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5809-28-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,8,0 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 5809-28:
(6*5)+(5*8)+(4*0)+(3*9)+(2*2)+(1*8)=109
109 % 10 = 9
So 5809-28-9 is a valid CAS Registry Number.