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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The overall environmental fate profile indicates that the substance 2,6-dibromo-4-cyanophenyl octanoate will not persist in the environment.

The substance is hydrolytically degraded at 25 °C with a half-life of 1.7 days at pH 9, 11.5 days at pH 7 and 34.1 days at pH 5 (5.7, 38.3 and 113.5 days, recalculated to 12 °C).

Exposed to artificial sunlight, the substance is photolytically degraded in air with a half-life of 40 h, in aqueous solution with a half-life ranging from 5.2 hours to 16.7 days and in soil with a half-life of 2.2 ­ 2.6 days.

A study on the ready biodegradability found that the substance cannot be considered to be readily biodegradable according to OECD criteria.

Aerobic biodegradation of the substance was investigated in a simulation study with different water/sediment in aquatic model ecosystems at 20 °C. The formation of 14CO2 after 100 days accounted for 55.2 and 55.4%, respectively, of the applied radioactivity. The determined DT50 of the test compound ranged from <2 to 4 hours (4.2 to 8.5 hours, recalculated to 12 °C).

In three different soils, the target substance attained 29.4 – 55.1% degradation (elevation of 14CO2) after 35 days and 19.4 °C, and the half-life of the test substance in soil was found to range from 0.14 – 0.62 days (0.28 – 1.25 days, recalculated to 12 °C).

The log Koc was determined in five different soils and ranges from 3.94 – 4.51 which indicates a tendency to adsorb to soil. The log BCF for 2,6-dibromo-4-cyanophenyl octanoate was measured to be 2.26 (BCF= 180±40) for whole fish (Lepomis macrochirus), indicating a low potential for bioaccumulation.

The Henry’s Law Constant was calculated as 1.9E-1 Pa m³/mol (20 °C). The substance is thus not expected to evaporate from the water surface.