1103509-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1103509-91-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,0,3,5,0 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1103509-91:
(9*1)+(8*1)+(7*0)+(6*3)+(5*5)+(4*0)+(3*9)+(2*9)+(1*1)=106
106 % 10 = 6
So 1103509-91-6 is a valid CAS Registry Number.