Allyl alcohol was administered to female Fischer 344 rats at doses of 0, 3, 10 and 30 mg/kg daily for 7 days. Plasma sorbitol dehydrogenase was minimally elevated. No dose related changes were observed in hexobarbital oxidation, aniline hydroxylation, or ethylmorphine demethylation. Aldrin epoxidation was slightly elevated. Naphthol glucuronidation and glutathione-S-transferase activity with 1,2-dichloro-4-nitrobenzene were increased. Results from in vivo studies on the metabolism of lindane were in close agreement with the in vitro measurements suggesting that daily treatment for one week with allyl alcohol at doses of 3, 10 and 30 mg/kg has no significant effect on phase I pathways, a selective effect on phase II pathways and, under the conditions of this experiment, minimal hepatoxic effects in these rats.