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EVOXNET PIP - CHLOROPICRIN Page 3 of 4 I Breakdown of.Chemical in Soil and-Groundwater: The half-life of chloropicrin in sandy loam soil was 8- 24 hours (279) and 4.5 days (280) with carbon dioxide being the terminal breakdown product (280). Chloropicrin moves rapidly in soils within twelve inches of injection but may diffuse to a maximum depth of four feet in sandy soil (281). Since it is only slightly soluble in water, it will not move rapidly in aquatic environments. In an anaerobic aquatic/soil system, chloropicrin was converted to nitromethane with a half-life of 1.3 hours (282). In the absence of sunlight or microorganisms, chloropicrin does not undergo hydrolysis (283, 284). The calculated Henry's Law Constant is 2.51 x 10 to the minus 3 atm meters cubed mole-1 (285). The Koc for silt loam and agricultural sand soils was 5.29 and 93.59 respectively (289). Chloropicrin can be produced during chlorination of drinking water if nitrated organic contaminants are present (286, 287). In a sampling of 1,386 wells in California between 1984 and 1989, no chloropicrin was detected (288). In a sampling of 15,175 wells in Florida, chloropicrin was found in three wells at 0.035-0.068 HgIL (288). . Breakd6wn of.Chemical in Surface Water: Since chloropicrin has a higher density than water (1.65 g/ml) r and is only slightly soluble, it will sink to the bottom of surface water. The half-life of chloropicrin in water w exposed to light was 31.1 hours with carbon dioxide, bicarbonate, chloride, nitrate and nitrite being the breakdown products (284). . Breakdown of Chemical in Plants: No chloropicrin or nitromethane was detected in crops grown in soil treated with radiolabelled chloropicrin (290). Carbon dioxide, as the terminal breakdown product, was metabolized by plants and incorporated into natural plant biochemical compounds via the single carbon pool (291). . Breakdown of Chemical in Air: Chloropicrin is efficiently photolyzed in the atmosphere. The half-life of chloropicrin in air exposed to simulated sunlight was 20 days (292). The photoproducts were phosgene (which will hydrolyze to carbon dioxide and hydrogen chloride), nitric oxide, chlorine, nitrogen dioxide and dinitrogen tetroxide. . Analytical Methods: The concentration of chloropicrin in air,may be measured using Kitagawa direct reading gas detector tube4172 (Matheson-Kitagawa, East Rutherford,NJ). Gas chromatography methods are available to measure chloropicrin in air(283) and may utilize XAD-4 solid sorbent tubes (SKC Inc., Eighty Four, PA). i PHYSICAL PROPERTIES AND GUIDELINES Physical Properties: . Appearance: Heavy, colorless, liquid with a sharp odor . Chemical Names: Trichloronitromethane; Methane,trichloronitro;Nitrotrichloro-methane,Nitrochloroform . CAS Number: 76-06-2 . Molecular Weight:164.38 . Water Solubility: 1.6 g/L @ 25 degrees C { . Solubility in Other Solvents: Miscible in most organic solvents . Melting Point: -64 degrees C a . Vapor Pressure: 18.3 mmHg @ 20 degrees C, 24 mmHg @ 25 degrees C . Partition Coefficient: Not Available a . Adsorption Coefficient: Not Available Exposure Guidelines: . ADI: Not Available . MCL:Not Available . RfD: Not Available . PEL: 0.1 ppm . HA: Not Available 4 . TLV: 0.1 ppm TWA BASIC MANUFACTURERS w Niklor Chemical Corp. 2060 E. 220th Street Long Beach, CA 90810 F REFERENCES: