The suspected chemical that caused the illnesses was 2-methylnaphthalene, used in the cereal packaging process. Little is known about 2-methylnaphthalene's impact on human health as the Food and Drug Administration has no scientific data on its impact on humans, and the United States Environmental Protection Agency (EPA) also does not have health and safety data. This is despite the EPA having sought information on it from the chemical industry for 16 years. 2-Methylnaphthalene is a component of crude oil and is "structurally related to naphthalene, an ingredient in mothballs and toilet-deodorant blocks" that the EPA considers a possible human carcinogen.