Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Stability

Photo transformation in air

In the atmosphere, 1-chloro-2-methylbenzene was shown to degrade in the presence of hydroxyl radicals. Assuming an OH-concentration of 500000 molecules/cm³ the atmospheric half-life of 1-chloro-2-methylbenzene accounts for 8.8 days and thus may indicate a potential for a long range atmospheric transport.

Hydrolysis

1 -Chloro-2-methylbenzene does not contain chemical moieties or reactive groups which would indicate hydrolysis under environmental conditions.

Biodegradation

1-Chloro-2-methylbenzene is neither readily, nor inherently biodegradable.

Bioaccumulation

The bioaccumulation potential of 1-chloro-2-methylbenzene is described by a BCF value between 20 and 112 indicating a low potential of bioaccumulation.

Transport and distribution

Adsorption/ desorption

On different subsurface soils Koc values in the range of 170 - 880 (logKoc 2.23 - 2.94) were obtained yielding an average Koc of 370. According to the classification of Swann (1983) the test item has a low to middle potential to sorb on soil or sediment.

Henry's Law Constant

The Henry's Law Constant of 1-chloro-2-methylbenzene accounts for 12.66 hPa m³/mol at temperatures between 20 and 25 °C. According Thomas (1990) the substance tends to rapidly volatilize from the liquid phase.

Distribution modelling

According to the Mackay Level I model, the main compartment of 1-chloro-2-methylbenzene is air (99.7%).