Registration Dossier
Registration Dossier
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EC number: 260-300-4 | CAS number: 56634-95-8
Endpoint summary
Administrative data
Description of key information
Additional information
The main abiotic pathway for degradation of the target compound 2,6-dibromo-4-cyanophenyl heptanoate is hydrolysis with a DT50 of 17.7 days at a temperature of 12 °C and pH 7. Photodegradation in air has a DT50 of 47 hours and in aqueous solution a DT50 ranging from 18 hours to >1 year.
Based on adequate and reliable read-across data from a structural analogue, 2,6-dibromo-4-cyanophenyl heptanoate is not readily biodegradable (OECD 301B), biodegrades in sediment with DT50 ranging from <2 to 4 hours (4.2 to 8.5 hours, recalculated to 12 °C), and in soil with a DT50 0.14 – 0.62 days (0.28 – 1.25 days, recalculated to 12 °C). In a test conducted with two sediments the formation of 14CO2 after 100 days accounted for 55.4 and 57.2%, respectively, of the applied radioactivity. In an experimental study conducted with three different soils 29.4 – 55.1% of the applied radioactivity were mineralized after 35 days.
Based on adequate and reliable read-across data 2,6-dibromo-4-cyanophenyl heptanoate degrades slowly in freshwater (DT50 = >1000 days).
The log BCF for 2,6-dibromo-4-cyanophenyl heptanoate was determined to be 2.26 (BCF= 180±40) for whole fish (Lepomis macrochirus), based on read across to 2,6-dibromo-4-cyanophenyl octanoate (CAS 1689-99-2).
The log Koc value of 4.71 indicates a potential of the substance for adsorption to soil and sediment particles. The Henry's Law Constant was calculated as 1.9E-1 Pa m³/mol indicating a low potential for evaporation from the water phase.
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