It's the active ingredient — the only ingredient, really — in the brand of mothballs with which we nuked the kitchen moths. Not worth the irritated mucosal membranes, believe me.

(The back of the box could be summed up as follows: "Just pretend you've come across a caché of sarin gas and are deploying it in your home — your own home, you lunatic — and you'll have some idea of how best to handle these seemingly innocuous little pellets. Oh, and keep out of reach of pets.")