28104-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28104-05-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,0 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 28104-05:
(7*2)+(6*8)+(5*1)+(4*0)+(3*4)+(2*0)+(1*5)=84
84 % 10 = 4
So 28104-05-4 is a valid CAS Registry Number.