Registration Dossier
Registration Dossier
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EC number: 619-057-3 | CAS number: 94667-33-1
Endpoint summary
Administrative data
Description of key information
In a study conducted in accordance with U.S.EPA-FIFRA Guideline N-163-1, aqueous14C-Didecyldimethylammonium Chloride (DDAC) was equilibrated with four soil types (sand, sandy loam, silty clay loam and silt loam) and adsorption and desorption coefficients and constants were determined. Initial test concentrations of the compound were 0.0, 0.70, 3.50, 5.35, 7.00 µg/ml. One-gram samples of soil were placed into sterile Nalgene bottles; triplicate aliquots of each standard solution were added to the Nalgene bottles. Soil suspensions were shaken in dark environmental chamber at 25ºC for 24 hours. Suspensions were then centrifuged and supernatants and soil were separated. Soil samples from the adsorption phase were shaken with 0.01 m CaCl2for 24 hours in dark environmental chamber at 25ºC. Suspensions were then centrifuged and supernatants and soil were separated. Sand samples were extracted with DMF-acetic acid for radioanalysis; all other soil types were combusted for radioanalysis. Sand had the lowest adsorption and desorption coefficients and adsorption phase mobility coefficient. Loam had the lowest desorption phase mobility coefficient. Silty clay loam had the highest coefficients.Didecyldimethylammonium Chloride has little or no potential for mobility in soil and should not pose an environmental risk for contamination of groundwater, under the conditions of this study.
Additional information
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