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X I ONNI:T PIP- CAR1101-1 IRAN <br />Environmental Fate: <br />littp://acc.t)rst.edu/cgi-bin/mis/01/pips/carbol-ur. htm <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 [ 141. <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) [3 1] <br />Basic Manufacturer: <br />FMC Corporation <br />Agricultural Chemicals Group <br />1735 Market Street <br />Philadelphia, PA 19103 <br />of <br />