Registration Dossier
Registration Dossier
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EC number: 405-370-0 | CAS number: 6334-25-4
Endpoint summary
Administrative data
Description of key information
Additional information
According to a Mackay Level I model calculation the main target compartments for N,N,N',N'-tetrakis-2-hydroxyethyl)hexanediamide will be the hydrosphere (99.9999 %). The calculated Henry’s Law constant of 0.0000008 Pa m³/mol at 20 °C indicates very low volatility of N,N,N',N'-tetrakis-2-hydroxyethyl)hexanediamide from surface waters. With a calculated Koc of 12.63 l/kg, the sorption potential of N,N,N',N'-tetrakis-2-hydroxyethyl)hexanediamide to soil or sediment organic matter is expected to be very low (Blume scale).
The QSAR calculated rate constant for the OH sensitized photodegradation of N,N,N',N'-tetrakis-2-hydroxyethyl)hexanediamide is approximately 7.62E-11 cm³/(molecule * s). At 500,000 OH radicals / cm³ (approximate 24-hour mean in central Europe) this corresponds to a half-life of 5.1 hours. Hydrolytical degradation in surface waters is expected to be relevant only in basic environments with a half-life of 174 days at pH 9 and 25 °C. Inherent but not ready biodegradation of the substance was observed in guideline studies. In view of the distribution behaviour of N,N,N',N'-tetrakis-2-hydroxyethyl)hexanediamide biodegradation is expected to be the predominant mechanism of removal from the environment.
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