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XFOXNET PIP-CARI30FURAN '*p://acc.orst.edu/cgi-bin/misi0l/pips/carbofur.htm <br /> Environmental Fate: <br /> • Breakdown in soil and groundwater: Carbofuran is soluble in water and is moderately persistent <br /> in soil. Its half-life is 30 to 120 days. In soil, carbofuran is degraded by chemical hydrolysis and <br /> microbial processes. Hydrolysis occurs more rapidly in alkaline soils [14]. Carbofuran breaks down <br /> in sunlight. Carbofuran has a high potential for groundwater contamination [14]. Carbofuran is <br /> mobile to very mobile in sandy loam, silty clay, and silty loam soils; moderately mobile in silty clay <br /> loam soils; and only slightly mobile in muck soils. Small amounts of carbofuran have been detected <br /> (1 to 5 ppb) in water table aquifers beneath sandy soils in New York and Wisconsin [14]. <br /> • Breakdown in water: In water, carbofuran is subject to degradation by chemical hydrolysis under <br /> alkaline conditions. Photodegradation and aquatic microbes may also contribute to degradation. The <br /> hydrolysis half-lives of carbofuran in water at 25 C are 690, 8.2, and 1.0 weeks at pH values of 6.0, <br /> 7.0, and 8.0, respectively. Carbofuran does not volatilize from water, nor does it adsorb to sediment <br /> or suspended particles [14]. <br /> • Breakdown in vegetation: The half-life of carbofuran on crops is about 4 days when applied to <br /> roots, and longer than 4 days if applied to the leaves [8]. <br /> Physical Properties: <br /> • Appearance: Carbofuran is an odorless, white crystalline solid. Heat breakdown can release toxic <br /> fumes. Fires, and the runoff from fire control, may produce irritating or poisonous gases. Closed <br /> spaces (storage, etc.) should be aired before entering. <br /> • Chemical Name: 2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate [10] <br /> • CAS Number: 1563-66-2 <br /> • Molecular Weight: 221.25 <br /> • Water Solubility: 320 mg/L @ 25 C [10] <br /> • Solubility in Other Solvents: acetone v.s.; acetonitrile v.s.; benzene v.s.; cyclohexone v.s. (5) <br /> • Melting Point: 153-154 C [10] <br /> • Vapor Pressure: 2.7 mPa @ 33 C [10] <br /> • Partition Coefficient: 1.2304-1.4150 [10] <br /> • Adsorption Coefficient: 22 [13] <br /> Exposure Guidelines: <br /> • ADI: 0.01 mg/kg/day [10] <br /> • MCL: 0.04 mg/L [19] <br /> • RfD: 0.005 mg/kg/day [20] <br /> • PEL: Not Available <br /> • HA: Not Available <br /> • TLV: 0.1 mg/m3 (8-hour) [31] <br /> Basic Manufacturer: <br /> FMC Corporation <br /> Agricultural Chemicals Group <br /> 1735 Market Street <br /> Philadelphia, PA 19103 <br /> 3 ot'4 5/1200 2:03 PM <br />