Studies Related to Biological Detoxification of Kraft Pulp Mill Effluent. IV.The Biodegradation of 14-Chlorodehydroabietic Acid with Mortierella isabellina

One of the fish-toxic chlorinated resin acids, 14-chlorodehydroabietic acid ( 5 ), found in kraft mill effluent is examined. When exposed to the fungus Mortierella isabellina, 5 is converted into a number of hydroxylated derivatives which show low levels of toxicity to fish. These biotransformation products were isolated and characterized.