Exposure to naphthalene mothballs can cause acute hemolysis (anemia) in people with glucose-6-phosphate dehydrogenase deficiency.[6] IARC classifies naphthalene as possibly carcinogenic to humans and other animals (see also Group 2B).[7] IARC points out that acute exposure causes cataracts in humans, rats, rabbits, and mice. Chronic exposure to naphthalene vapors is reported to also cause cataracts and retinal hemorrhage.[8] Under California's Proposition 65, naphthalene is listed as "known to the State to cause cancer".[9]