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Extra resources for Agrochemical and Pesticide Desk Reference on CD-ROM
The photosensitized oxidation was probably due to the presence of singlet oxygen. The degradation rate was higher in soils containing the lowest organic carbon (Gohre and Miller, 1986). Chemical/Physical. Stable at temperatures below 210°C (Worthing and Hance, 1991). Emits very toxic fumes of phosphorus and sulfur oxides when heated to decomposition (Sax and Lewis, 1987; Lewis, 1990). , 1967). 2 mg/m3. Formulation Types: Emulsifiable concentrate; wettable powder; granules; dustable powder; fogging concentrate.
3% of the applied dosage was removed (Leigh, 1969). Soil. Heptachlor reacted with reduced hematin forming chlordene which decomposed to hexachlorocyclopentadiene and cyclopentadiene (Baxter, 1990). The reported half-life in soil is 9–10 months (Hartley and Kidd, 1987). Heptachlor was rapidly converted to 1-hydroxychlordene in eight dry soils having low moisture contents. , 1965). , 1984). Harris (1969) concluded that heptachlor has a very low tendency to leach in soils. Groundwater. S. EPA (1986) heptachlor has a high potential to leach to groundwater.
The Merck Index, 10th ed. , 1983), 1463 p. B. Walker, Eds. The Pesticide Manual — A World Compendium, 9th ed. (Great Britain: British Crop Protection Council, 1991), 1141 p. © 2000 CRC PRESS LLC ABBREVIATIONS AND SYMBOLS Å α αa αb ≈ ACGIH ASTM asym atm b B β BCF bp C °C cal CAS CEC CERCLA CHRIS cm CL CS DOT ds dw δ EC50 et al. 15) acid dissociation constant distribution coefficient (cm) base dissociation constant distribution coefficient (cm3/g) kilogram Henry’s law constant (atm · m3/mol · K) Henry’s law constant (dimensionless) soil/sediment partition coefficient (organic carbon basis) soil/sediment partition coefficient (organic matter basis) n-octanol/water partition coefficient kilohertz kilopascal dissociation constant for water (10–14 at 25°C) less than less than or equal to liter pound lethal concentration necessary to kill 50% of the aquatic species tested lethal concentration necessary to kill 100% of the aquatic species tested lethal dose necessary to kill 50% of the mammals tested lower explosive limit meter meta (as in m-dichlorobenzene) molarity (moles/liter) mass milliequivalents milligram minute(s) milliliter mass of sorbed solute millimeters of mercury millimole mole melting point mass of solute in solution millivolt normality (equivalents/liter) normal (as in n-propyl, N-nitroso) effective porosity nanogram National Institute for Occupational Safety and Health nanometer ortho (as in o-dichlorobenzene) Occupational Safety and Health Administration specific density (unitless) © 2000 CRC PRESS LLC pP Pa pair PEL pH pKa pKb pKw ppb ppm P-t1/2 pv QSAR R Ra Rb RCRA Rd Rf RTECS S Sa SARA secSo Sw sp.