109981-07-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109981-07-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,8 and 1 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 109981-07:
(8*1)+(7*0)+(6*9)+(5*9)+(4*8)+(3*1)+(2*0)+(1*7)=149
149 % 10 = 9
So 109981-07-9 is a valid CAS Registry Number.