Pesticide products or
"formulations" contain two types of ingredients - "active",
and "inert". Active ingredients are the ingredients listed on the
label, which are responsible for preventing, destroying, or mitigating the targeted
pest. Inert ingredients are any ingredients other than an active ingredient.
Inerts are used to make the pesticide product more potent or easier to use. The
name does not mean that they are biologically, chemically, or toxicologically
inert. In fact many inerts threaten human and environmental health. Almost all
pesticides that are registered for use in Canada contain inert ingredients, but
they do not have to be disclosed on the pesticide label.
For more information about inert ingredients in pesticides see: