109740-85-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109740-85-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,4 and 0 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 109740-85:
(8*1)+(7*0)+(6*9)+(5*7)+(4*4)+(3*0)+(2*8)+(1*5)=134
134 % 10 = 4
So 109740-85-4 is a valid CAS Registry Number.