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• EXTOXNET PIP-PENTACHLOROPHENOL (PCP) Page 1 of 5' <br /> EXTOXNET <br /> Extension Toxicology Network <br /> Pesticide Information Profiles <br /> A Pesticide Information Project of Cooperative Extension Offices of Cornell University, Oregon State <br /> University of Idaho and the University of California at Davis and the Institute for <br /> University, the Um ty ty <br /> Environmental Toxicology,Michigan State University. Major support and funding was provided by the <br /> USDA/Extension Service/National Agricultural Pesticide Impact Assessment Program. <br /> EXTOXNET primary files maintained and archived at Oregon State University <br /> Revised June 1996 <br /> Pentachlorophenol (PCP) <br /> Trade and Other Names: Trade names for pentachlorophenol include Dowicide, PCP, <br /> Penchlorol,Penta,Penta Plus, Pentachloral, Pentacon, Penwar,Priltox, Santobrite, Santophen, Sinituho, <br /> and Weedone. <br /> Regulatory Status: Pentachlorophenol is a moderately toxic compound in EPA toxicity class 11. It <br /> is a Restricted Use Pesticide (RUP) in its formulations as a wood preservative,but a General Use <br /> Pesticide (GUP) for other purposes; labels for products containing it must bear the Signal Word <br /> DANGER. <br /> Chemical Class: chlorinated hydrocarbon <br /> Introduction: Pentachlorophenol(PCP) is a chlorinated hydrocarbon insecticide and fungicide. It is <br /> primarily used to protect timber from fungal rot and wood-boring insects,but may also be used as a <br /> preharvest defoliant in cotton, a general pre-emergence herbicide, and as a biocide in industrial water <br /> systems. It is available in blocks, flakes, granules, liquid concentrates,wettable powders,or ready-to-use <br /> petroleum solutions. <br /> Data presented in this profile are for technical grade pentachlorophenol,unless otherwise stated. <br /> Technical grade PCP has historically contained dioxins (e.g. tetra-, hexa- and octochlorodibenzo-p- <br /> dioxin) and hexachlorobenzene as manufacturing by-products. Technical grade PCP is typically about <br /> 86%pure. The discovery of these compounds in technical grade PCP may be one reason for its being <br /> phased out of use. Pentachlorophenol is also a major product of the metabolism of hexachlorobenzene in <br /> mammals. <br /> Formulation: It is available in blocks flakes granules, liquid concentrates wettable powders, or <br /> , , � , q , P , <br /> ready-to-use petroleum solutions. <br /> http://`extoxnet.orst.edu/pips/Pentachl.htm 5/8/2008 <br />