109808-11-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109808-11-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,8,0 and 8 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109808-11:
(8*1)+(7*0)+(6*9)+(5*8)+(4*0)+(3*8)+(2*1)+(1*1)=129
129 % 10 = 9
So 109808-11-9 is a valid CAS Registry Number.