Mira, if I remember rightly, napthalene is an industrial solvent and I don`t think it would be legal to use it as a pesticide. I might be wrong but I don`t think so. David.
Your right Caj they use it in those toilet block thingies as well pretty dangerous stuff I copied this out of an article, Hospitals have reported many cases of hemolytic anemia in children, including newborns and infants, who either ate naphthalene mothballs or deodorants cakes or who were in close contact with clothing or blankets stored in naphthalene mothballs. Naphthalene can move from a pregnant woman's blood to the unborn baby's blood. Naphthalene has been detected in some samples of breast milk from the general U.S. population, but not at levels that are expected to be of concern. Mira it may be worth looking for an alternative parasite preventative.
Naphthalene (not to be confused with naphtha) (also known as naphthalin, naphthaline, moth ball, tar camphor, white tar, or albocarbon), is a crystalline, aromatic, white, solid hydrocarbon, best known as the primary ingredient of mothballs. Naphthalene is volatile, forming a flammable vapor. Its molecules consist of two fused benzene rings. It is manufactured from coal tar, and converted to phthalic anhydride for the manufacture of plastics, dyes and solvents. It is also used as an antiseptic and insecticide, especially in mothballs. p-Dichlorobenzene is now often used instead of naphthalene as a mothball substitute. Naphthalene easily sublimates at room temperature. Being a chemist I just had to look it up!! Straight from wickipedia
Sublimates is where a solid turns into a gas without going through a liquid stage. It's what carbon dioxide does when you get that dry ice smoke effect in discos.
