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:TOXNET PIP-LAMBDA CYHALOTHRIN Page 3 of 4 population),for the eastern oyster of 0.59 ng/L has been reported (107). Bioconcentration is possible in aquatic species,but bioaccumulation is not likely. Bioconcentration in channel catfish has been reported as minimal, with rapid depuration(elimination) (111). A bioconcentration factor of 858 has been reported in fish(4, species unspecified),but concentration was confined to non-edible tissues and rapid depuration was observed (107). . Effects on Other Animals (Nontarget species): Lambda cyhalothrin is highly toxic to bees, with a reported oral LD50 of 38 ng/bee and reported contact LD50 of 909 ng/bee (0.9 ug/bee) (107). NVIRONMENTAL FATE reakdown of Chemical in Soil and Groundwater: Lambda cyhalothrin is moderately persistent in the soil ivironment. Reported field half-lives range from four to 12 weeks (107, 111, 112). Its field half-life is probably close 30 days in most soils (112). It shows a high affinity for soil;the reported Koc is 180,000 (112)..Lambda cyhalothrin not expected to be appreciably mobile in most soils. There is little potential for groundwater contamination. Soils ith high sand content or with very low organic matter content may tend to retain the compound to a lesser degree. In eld studies of Karate, leaching of lambda cyhalothrin and its degradates from the soil were minimal (12, 107). reakdown products formed in the soil environment are similar to those formed in mammalian systems, via the ydrolysis of the central ester bond and oxidation(12). Breakdown rates of both the technical product and Karate were milar under aerobic and anaerobic conditions (107, 111). ,reakdown of Chemical in Surface Water: Lambda cyhalothrin has extremely low water solubility and is tightly ound to soil,it is therefore not expected to be prevalent in surface waters. One possible source of infiltration into .uface waters would be surface runoff. In this event,the compound would most probably remain bound to the solid article and settle to the bottom. reakdown of Chemical in Vegetation: No data were available regarding the breakdown of lambda cyhalothrin in egetation. 'HYSICAL PROPERTIES AND GUIDELINES 'hysical Properties: • Appearance: Lambda cyhalothrin is a colorless solid at room temperature, but may appear yellowish in solution. • Chemical Name: (RS)-alpha-cyano-3-phenoxybenzyl 3-(2-chloro-3,3,3-trifluoropropenyl)-2,2,- dimethylcyclopropanecarboxylate (12) • CAS Number: 91465-08-6 (12) • Molecular Weight: 449.9 (12) • Water Solubility: 0.005 mg/L @ pH 6.5 and 20 degrees C(12) • Solubility in Other Solvents: acetone v.s, methanol v.s.,toluene v.s., hexane v.s. (12) • Melting Point: 49.2 degrees C (12) • Vapor Pressure: negligible at 20 degrees C (12) • Partition Coefficient:10,000,000 (12) • Adsorption Coefficient: 180, 000 (112) Exposure Guidelines: • ADI: Not Available • MCL:Not Available • P.M: 0.005 mg/kg/day (106) • PEL: Not Available • HA:Not Available • TLV:Not Available BASIC MANUFACTURER