109442-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109442-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,4,4 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109442-91:
(8*1)+(7*0)+(6*9)+(5*4)+(4*4)+(3*2)+(2*9)+(1*1)=123
123 % 10 = 3
So 109442-91-3 is a valid CAS Registry Number.