Naphthalene is derived from coal tar or petroleum and is used within traditional or 'old fashioned' mothballs. We do not sell any products which contain naphthalene due the adverse impacts on children and pets. We do not consider them safe for use around the home. They can cause breathing difficulties in adults as well, particularly in poorly ventilated areas. Naphthalene moth balls are also toxic, carcinogenic and highly flammable!