28239-84-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28239-84-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,2,3 and 9 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 28239-84:
(7*2)+(6*8)+(5*2)+(4*3)+(3*9)+(2*8)+(1*4)=131
131 % 10 = 1
So 28239-84-1 is a valid CAS Registry Number.