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EXTOXNET PIP-ORYZALIN http://extoxnet.orst.ediVpips/oryzalin.htm <br /> • Breakdown in water: No breakdown of oryzalin by hydrolysis was observed at pH 5, 7, and 9 <br /> [8]. Based on its behavior in soil, breakdown by microbial processes is probably slow in the <br /> aquatic environment due to low levels of oxygen and low microbial activity. Photodegradation <br /> may be significant in the upper portions of the water column. <br /> • Breakdown in vegetation: Oryzalin is readily absorbed via the roots, and plant metabolism of <br /> oryzalin is minimal [58]. <br /> Physical Properties: <br /> • Appearance: Technical oryzalin is a bright yellow-orange crystalline powder [1]. <br /> • Chemical Name: 3,5-dinitro-N4,N4-dipropylsulfanilamide [1] <br /> • CAS Number: 19044-88-3 <br /> • Molecular Weight: 346.36 <br /> • Water Solubility: 2.5 mg/L @ pH 7 and 25 C [1] <br /> • Solubility in Other Solvents: v.s. in organic solvents such as acetone, methanol, and acetonitrile; <br /> s.s. in benzene and xylene; i.s. in hexane [1] <br /> • Melting Point: 141-142 C [1] <br /> • Vapor Pressure: <0.013 mPa @ 30 C [1] <br /> • Partition Coefficient: 3.7340 @ pH 7 [1] <br /> • Adsorption Coefficient: 600 [11] <br /> Exposure Guidelines: <br /> • ADL• Not Available <br /> • MCL: Not Available <br /> • RfD: 0.05 mg/kg/day [13] <br /> • PEL: Not Available <br /> • HA: Not Available <br /> • TLV: Not Available <br /> Basic Manufacturer: <br /> DowElanco <br /> 9330 Zionsville Road <br /> Indianapolis, IN 46268-1054 <br /> • Phone: 317-337-7352 <br /> • Emergency: 800-258-3033 <br /> References: <br /> References for the information in this PIP can be found in Reference List Number 10 <br /> DISCLAIMER: The information in this profile does not in any way replace or supersede the <br /> information on the pesticide product labeling or other regulatory requirements. Please refer to the <br /> 3 of 4 2/20/2008 2:07 PM <br />