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EXTOXNET PIP - CHLORPYRIFOS Page 4 of 4 <br /> . Breakdown in vegetation: Chlorpyrifos may be toxic to some plants, such as lettuce [36]. Residues remain on <br /> plant surfaces for approximately 10 to 14 days. Data indicate that this insecticide and its soil metabolites can <br /> accumulate in certain crops [8]. <br /> Physical Properties: <br /> • Appearance: Technical chlorpyrifos is an amber to white crystalline solid with a mild sulfur odor[13]. <br /> • Chemical Name: O,O-diethyl 0-3,5,6-trichloro-2-pyridyl phosphorothioate [13] <br /> • CAS Number: 2921-88-2 <br /> • Molecular Weight: 350.62 <br /> • Water Solubility: 2 mg/L @ 25 C [13] <br /> • Solubility in Other Solvents: benzene s.; acetone s.; chloroform s.; carbon disulfide s.; diethyl ether s.; xylene s.; <br /> methylene chloride s.; methanol s. [13] <br /> • Melting Point: 41.5-44 C [13] <br /> • Vapor Pressure: 2.5 mPa @ 25 C [13] <br /> • Partition Coefficient: 4.6990 [13] <br /> • Adsorption Coefficient: 6070 [19] <br /> Exposure Guidelines: <br /> • ADI: 0.01 mg/kg/day [38] <br /> • MCL:Not Available <br /> • RfD: 0.003 mg/kg/day [53] <br /> • PEL: 0.2 mg/m3 (8-hour) (skin) <br /> • HA: 0.02 mg/L (lifetime) [53] <br /> • TLV:Not Available <br /> Basic Manufacturer. <br /> DowElanco <br /> 9330 Zionsville Rd. <br /> Indianapolis, IN 46268-1054 <br /> • Phone: 317-337-7344 <br /> • Emergency: 800-258-3033 <br /> References: <br /> References for the information in this PIP can be found in Reference List Number 5 <br /> DISCLAIMER: The information in this profile does not in any way replace or supersede the information on the pesticide <br /> product labeling or other regulatory requirements. Please refer to the pesticide product labeling. <br /> v <br /> http://extoxnet.orst.edu/pips/chlorpyr.htm 3/13/200( <br />