Registration Dossier
Registration Dossier
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EC number: 225-582-5 | CAS number: 4940-11-8
Endpoint summary
Administrative data
Description of key information
General discussion of environmental fate and pathways:
Abiotic degradation:
Hydrolysis was not assessed because the substance is readily biodegradable. There are no obvious hydrolysable groups present in the chemical structure.
Biotic degradation:
In a biodegradation screening study (OECD TG 301B closed system, GLP, reliability 2), after 28 days exposure of secondary effluent of an unacclimatised activated sludge plant to 15.5 mg/l (9.19 mg test substance/L based on organic carbon content), 104% biodegradation was observed. Based on these findings the substance is considered to be readily biodegradable.
Bioaccumulation:
Bioaccumulation in aquatic and terrestrial species is based on available information (measured log Kow of 2.9) and calculated BCF values). The BCFs for aquatic and terrestrial organisms were calculated using QSARs of Veith et al (1979) and Jager (1998), both incorporated in the EUSES model, and yielded values of 232 and 10.4 L/kg wwt, respectively.
Transport and distribution:
The adsorption coefficient can be calculated because the measured log Kow is 2.9 (<3). The estimated Koc value of 337 (log Koc = 2.53) was calculated using EUSES (non-hydrophobics equation).
The Henry's law constant is calculated using the equation from EUSES. Using a molecular weight of 140, the experimental determined vapour pressure of 0.2Pa (at 24oC) and the water solubility of 9345 (at 24oC) the Henry's law constant is 0.003 and 0.0015 Pa. m3/mol (at 25 and 12 °C, respectively). Based on this value partitioning from water to air is negligible.
Additional information
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