Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


Photo transformation in air

No data are available.


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


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


2-Chlorotoluene proved to be of low bioconcentration potential (BCF 87.2 to 112 L/kg whole body wet-weight) in fresh water fish (carp) for the two tested concentrations of 0.3 mg/L and 0.03 mg/L (flow-through), respectively, indicating a low potential to accumulate in biota.

Transport and distribution

Adsorption/ desorption

The adsorption of 2-chlorotoluene to soil was determined as the geometric mean Koc over 19 soil samples of differential depth (0-675 cm) at a geometric mean TOC concentration of 0.2 %. A log Koc of 2.54 had been determined, characterizing the substance as medium mobile in soil according to the classification scheme for mobility in soil by McCall et al. (1981).

Henry's Law Constant

Henry's law constant at 20 °C for 2-chlorotoluene was calculated from the experimentally determined vapour pressure (382.4 Pa at 20 °C) and water solubility (62 mg/L at 20 °C) to be 780.7 Pa*m³/mol. According to Thomas (1990) the substance tends volatilize rapidly 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%).