13111-28-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13111-28-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,1 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 13111-28:
(7*1)+(6*3)+(5*1)+(4*1)+(3*1)+(2*2)+(1*8)=49
49 % 10 = 9
So 13111-28-9 is a valid CAS Registry Number.