Hank,
I would not buy it. It is most likely made of carbolic acid, AKA, phenol. So there are two possibilities here, 1 the phenol is at such a low level that it is safe to the user but ineffective, or 2 it is high enough to be effective but also high enough to cause damage to you or your children.
From the CDC concerning phenol;
-prevent skin contact
-exposuer limit of 50ppm
-will affect liver and kidney function
So it is either a sham or will kill you.