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;XTOXNET PIP - 2,4-D Page 3 of 3 <br /> �. increase with increased nutrients, sediment load, and dissolved organic carbon. Under oxygenated conditions <br /> the half-life is 1 week to several weeks [20]. <br /> . Breakdown in vegetation: 2,4-D interferes with normal plant growth processes. Uptake of the compound is <br /> through leaves, stems, and roots. Breakdown in plants is by a variety of biological and chemical pathways <br /> [101. 2,4-D is toxic to most broad leaf crops, especially cotton,tomatoes, beets, and fruit trees [7]. <br /> Physical Pro erties: <br /> . Appearance: 2,4-D is a white powder [6]. <br /> . Chemical Name: (2,4-dichlorophenoxy)acetic acid [6] <br /> . CAS Number: 94-75-7 <br /> k . Molecular Weight: 221.04 <br /> . Water Solubility: 900 mg/L @ 25 C (acid) [5] <br /> . Solubility in Other Solvents: ethanol v.s.; diethyl ether v.s.; toluene s.; xylene s. [6] <br /> . Melting Point: 140.5 C [6] <br /> . Vapor Pressure: 0.02 mPa @ 25 C (acid) [51 <br /> . Partition Coefficient: 2.81 [20] <br /> 4 <br /> . Adsorption Coefficient: 20 (acid) [21] <br /> Exposure Guidelines: <br /> . ADI: 0.3 mg/kg/day [29] <br /> L: 0.07 m IL <br /> 30 <br /> MC g [ ] <br /> . RfD: 0.01 mg/kg/day [31] <br /> . PEL: 10 mg/m3 (8-hour) [32] <br /> . HA: Not Available <br /> . TLV: Not Available <br /> Basic Manufacturer; <br /> Rhone-Poulenc Ag. Co. <br /> 1 P.O. Box 12014 <br /> 2 T.W. Alexander Dr. <br /> Research Triangle Park,NC 27709 <br /> . Phone: 919-549-2000 <br /> . Emergency: 800-334-7577 <br /> References: <br /> References for the information in this PIP can be found in Reference List Number 7 <br /> PI SSC EVIlJR: The information in this profile does not in any way replace or supersede the information on the <br /> pesticide product labeling or other regulatory requirements. Please refer to the pesticide product labeling. <br />