Most of these chemicals are absorbed through the skin. Children roll on the lawn and skin their knees on the grass. Pets and children track chemicals into the house even after they are dry. This doesn't count the days when the treated grass is wet from rain or dew. They are not chemically inert and most are toxic or carcinogenic in their own right.
Most people use the brand name for pesticides.
The chemical name is less inviting. There are several cities which have laws prohibiting the use of pesticides near schools, parks, and libraries as a measure to protect the children of their cities.