28109-92-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28109-92-4 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 9 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 28109-92:
(7*2)+(6*8)+(5*1)+(4*0)+(3*9)+(2*9)+(1*2)=114
114 % 10 = 4
So 28109-92-4 is a valid CAS Registry Number.