1109-03-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1109-03-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,0 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1109-03:
(6*1)+(5*1)+(4*0)+(3*9)+(2*0)+(1*3)=41
41 % 10 = 1
So 1109-03-1 is a valid CAS Registry Number.