Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

1,2-dichlorobenzene is expected to predominantly partition to the atmospheric compartment due to its high volatility. There, the substance is photodegraded by reaction with photochemically produced OH radicals with a half-life of 38 days. Where released to either soil or water compartments, the substance volatilises into the surrounding atmosphere.

Degradation by hydrolysis under environment conditions is unlikey to occur due to the chemical structure of 1,2-dichlorobenzene. Where 1,2-dichlorobenzene becomes associated with soil or sediment, it can be expected to exhibit moderate mobility.

1,2-dichlorobenzene is not readily biodegradable. However, under aerobic conditions, the substance can be degraded by adapted microorganisms in water and soil. Under anaerobic conditions, biodegradation could not be proved unambiguously.

Degradation of 1,2 -dichlorobenzene in soil is slow with a DT50 at 12°C of 806 days. 1,2-dichlorbenzene has a low potential to bioaccumulate if BCF values in terms of whole organisms (fish and aquatic invertebrates) are considered (BCF in the order of magnitude of 260). The highest BCF in terms of lipid content was found in Blue crab to be 28840.