109405-12-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109405-12-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,4,0 and 5 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 109405-12:
(8*1)+(7*0)+(6*9)+(5*4)+(4*0)+(3*5)+(2*1)+(1*2)=101
101 % 10 = 1
So 109405-12-1 is a valid CAS Registry Number.