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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


Photodegradation in air:

The calculated atmospheric half-life of 4-chlorotoluene is 8.8 days (Bayer Industry Services, 2004).


As chlorine is a ring substituent, hydrolysis is not expected to be an important process in determining the environmental fate of p-chlorotoluene (Jaber, 1984). Neutral pH values when dissolved in water and stability are basic properties of chlorotoluenes (Rossberg, 2000).


Biodegradation in water: screening tests

Readily biodegradation:

After 14 d, 0 % of 4 -chlorotoluene were degraded preforming a ready biodegradabiltiy test corresponding to OECD 301C (MITI, 1992).

Inherently biodegradation:

4 -Chlorotoluene was degraded about 86 % after 28 d testing the inherent biodegradability of the test substance. Due to the significant elimination (68 %) within 3 h there is evidence that the disappearance of p-chlorotoluene is caused by physico-chemical effects rather than biodegradation processes.


Bioaccumulation: aquatic/sediment

The bioconcentration factor for 4-chlorotoluene was determined at two different concentration levels using fish (MITI, 1992):

0.3 mg/L: BCF 21.9 - 76.5

0.03 mg/L: BCF 14 - 101.6

Transport and Distribution

Adsorption/desorption behaviour

The distribution behaviour of 4 -chlorotoluene between water and soil was determined according to OECD guideline 106 (batch method). Three different soils were used yielding the following results (RCC, 1992):

sand: Koc = 512.2

loamy sand: Koc = 327.1

sandy loam: Koc = 335.9

Henry's Law Constant

The Henrys Law Constant for 4 -chlorotoluene was calculated based on the Bond Method (446.8 Pa*m³/mole) as well as the Group Method (494.5 Pa*m³/mole) applying the EPI-Suite software (Bayer Industry Services, 2004).

Distribution Modelling

The distribution of p-chlorotoluene in a "unit world" was calculated according to the Mackay fugacity model level I (Bayer Industry Services, 2004) based on the physico-chemical properties of the test substance. The main target compartment for p-chlorotoluene is air with 99.67 %, followed by water with 0.24 %, and soil with 0.04%.