4-Chlor-3-nitrobenzolsulfonamid

TERRESTRIAL FATE: Based on a recommended classification scheme(1), an estimated Koc value of 54(SRC), determined from an experimental log Kow(2) and a recommended regression-derived equation(3), indicates that 4-chloro-3-nitrobenzenesulfonamide should have very high mobility in soil(SRC). Volatilization of 4-chloro-3-nitrobenzenesulfonamide should not be important from moist soil surfaces(SRC) given an estimated Henry's Law constant of 1.2X10-9 atm-cu m/mole(4,SRC), or from dry soil surfaces(SRC) based on an estimated vapor pressure of 1.8X10-6 mm Hg(5,SRC). Insufficient data are available to determine the rate or importance of biodegradation of 4-chloro-3-nitrobenzenesulfonamide in soil(SRC).

AQUATIC FATE: An estimated Koc value of 54(SRC), determined from an experimental log Kow(1) and a recommended regression-derived equation(2), indicates that 4-chloro-3-nitrobenzenesulfonamide should not adsorb to suspended solids and sediment(SRC) in the water(2,SRC). 4-Chloro-3-nitrobenzenesulfonamide would be essentially non-volatile from water surfaces based on an estimated Henry's Law constant of 1.2X10-9 atm-cu m/mole(SRC), developed using a fragment constant estimation method(3). An estimated BCF value of 1.9(2,SRC), from an experimental log Kow(1), suggests that 4-chloro-3-nitrobenzenesulfonamide will not bioconcentrate in aquatic organisms(SRC) according to a recommended classification scheme(4). Insufficient data are available to determine the rate or importance of biodegradation of 4-chloro-3-nitrobenzenesulfonamide in water(SRC).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 4-chloro-3-nitrobenzenesulfonamide, which has an estimated vapor pressure of 1.8X10-6 mm Hg at 25 °C(2,SRC) will exist as both a vapor and particulate in the ambient atmosphere. Vapor-phase 4-chloro-3-nitrobenzenesulfonamide is degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be about 438 days(3,SRC). Particulate-phase 4-chloro-3-nitrobenzenesulfonamide may be physically removed from the air by wet and dry deposition(SRC).

The Koc of 4-chloro-3-nitrobenzenesulfonamide is estimated as approximately 54(SRC), using an experimental log Kow of 0.66(1) and a regression-derived equation(2,SRC). According to a recommended classification scheme(3), this estimated Koc value suggests that 4-chloro-3-nitrobenzenesulfonamide should have very high mobility in soil(SRC).

An estimated BCF value of 1.9 was calculated for 4-chloro-3-nitrobenzenesulfonamide(SRC), using an experimental log Kow of 0.66(1) and a recommended regression-derived equation(2). According to a recommended classification scheme(3), this BCF value suggests that bioconcentration in aquatic organisms will not be an important fate process(SRC).

The Henry's Law constant for 4-chloro-3-nitrobenzenesulfonamide is estimated as 1.2X10-9 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This value indicates that 4-chloro-3-nitrobenzenesulfonamide will be essentially nonvolatile from water surfaces(2,SRC). 4-Chloro-3-nitrobenzenesulfonamide's vapor pressure, 1.8X10-6 mm Hg(3,SRC) and Henry's Law constant(1,SRC) indicate that volatilization from dry or moist soil should not occur(SRC).

The rate constant for the vapor-phase reaction of 4-chloro-3-nitrobenzenesulfonamide with photochemically produced hydroxyl radicals has been estimated as 3.8X10-14 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1,SRC). This corresponds to an atmospheric half-life of about 438 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1,SRC).

4-Chloro-3-nitrobenzenesulfonamide's production and use as a dye intermediate may result in its release to the environment through various waste streams. If released to soil, 4-chloro-3-nitrobenzenesulfonamide should have very high mobility. Volatilization of 4-chloro-3-nitrobenzenesulfonamide should not be important from moist or dry soil surfaces. Insufficient data are available to determine the rate or importance of biodegradation of 4-chloro-3-nitrobenzenesulfonamide in soil or water. If released to water, 4-chloro-3-nitrobenzenesulfonamide should not adsorb to suspended solids and sediment. 4-Chloro-3-nitrobenzenesulfonamide would be essentially non-volatile from water surfaces. An estimated BCF value of 1.9 suggests that 4-chloro-3-nitrobenzenesulfonamide will not bioconcentrate in aquatic organisms. If released to the atmosphere, 4-chloro-3-nitrobenzenesulfonamide will exist as both a vapor and particulate. Vapor-phase 4-chloro-3-nitrobenzenesulfonamide is degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals with an estimated half-life of about 438 days. Particulate-phase 4-chloro-3-nitrobenzenesulfonamide may be physically removed from the air by wet and dry deposition. (SRC)