109438-85-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109438-85-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,4,3 and 8 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 109438-85:
(8*1)+(7*0)+(6*9)+(5*4)+(4*3)+(3*8)+(2*8)+(1*5)=139
139 % 10 = 9
So 109438-85-9 is a valid CAS Registry Number.