109980-80-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109980-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,8 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109980-80:
(8*1)+(7*0)+(6*9)+(5*9)+(4*8)+(3*0)+(2*8)+(1*0)=155
155 % 10 = 5
So 109980-80-5 is a valid CAS Registry Number.