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EXTOXNET PIP -PENTACHLOROPHENOL(PCP) Page 4 of 5 <br /> 0.06 ppt to 0.64 ppb.[15]. <br /> . Breakdown in water: In the water environment,PCP is mainly bound to sediments and <br /> suspended particles in water[12].PCP will dissociate by releasing a hydrogen ion and may then <br /> be more readily degraded by sunlight or microorganisms [12].In water,biodegradation occurs, <br /> mainly at the surface, with a half-life ranging from hours to days [12]. It does not evaporate to a <br /> significant degree. PCP has been detected at very low levels in rivers and streams (0.01 to 16 <br /> ug/L), surface water systems (1.3.to 12 ug/L), and seawater(0.02 to 11 ug/L) [12]- <br /> • Breakdown in vegetation: PCP may be taken up by plants; lettuce grown on soil containing PCP <br /> contained low levels of PCP residues [12]. Uptake and accumulation vanes according to plant <br /> species. PCP is strongly toxic to plants [9]. <br /> Physical Properties: <br /> . Appearance: At room temperature,pentachlorophenol is a colorless crystalline solid with a <br /> phenolic odor[9]. Color may vary.from white to dark grayish brown, depending on the purity of <br /> the compound [9]. <br /> . Chemical Name: pentachlorophenol[9] <br /> . CAS Number: 87-86-5 <br /> Molecular Weight:.266.34 <br /> . Water Solubility: 80 mg/L @ 20 C [9] <br /> . Solubility in Other Solvents: v.s. in acetone, alcohols, ether, and benzene; s. in petroleum ether, <br /> carbon tetrachloride, and paraffins [9] <br /> . Melting Point: 191 C [9] <br /> . Vapor Pressure: 16,000 mPa @ 20 C [9] <br /> . Partition Coefficient: 5.12 [17] <br /> Adsorption Coefficient: 30 (at pH 7) (estimated) [15] <br /> Exposure Guidelines: <br /> . ADI: Not Available <br /> . MCL: 0.001 mg/L [67] <br /> o RfD: 0.03 mg/kg/day [8] <br /> . PEL: O.S mg/m3 (8-hour) [28] <br /> . HA: Not Available <br /> TLV: Not Available <br /> Basic Manufacturer: <br /> ISK Biosciences <br /> 5966 Heisley Road <br /> P.O. Box 8000 <br /> Mentor, OH 44061-8000 <br /> . Phone: 216-357-4160 <br /> . Emergency: 216-357-7070 <br /> References: <br /> References for the information in this PIP can be found in Reference List Number 6 <br /> http://extoxnet.orst.edu/pips/pentachl.htin 5/8/2008 <br />