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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Stability in water:

The test substance was shown to be hydrolytically stable at pH 4, 7, and 9 [t1/2 (25°C) > 1 year].

Phototransformation on soil is likely to contribute to the degradation of the test substance under outdoor conditions, based on the experimental DT50 value of 3.9 days for irradiated samples, from which 10.4 and 16.1 solar summer days at Phoenix (Arizona, USA) and Athens (Greece) are calculated, respectively

Biodegradability:

Not ready biodegradable

Aerobic Biodegradation in soil (DT50): 5.9 – 60.9 days at 12°C (temperature corrected values)

Anaerobic Biodegradation in soil (DT50): > 1000 days at 20 °C

Adsorption/desorption:

Koc values are in the range of 33.7 to 246.7 mL/g. Depending on the soil type the mobility of the test substance can be classified from mobile to low mobile in the tested soils.

Additional information

Stability:

In a first approach, data on the potential for hydrolysis are indicative for the stability of the test item in the environment. Following “Notification Concerning Test Data for Registration of Agricultural Chemicals” (12 Nohsan No. 8147) and the measurement method stipulated in the OECD Test Guideline 111 the abiotic hydrolysis of 2-{2-chloro-4-mesyl-3-[(tetrahydrofuran-2-lmethoxy)methyl]benzoyl}cyclohexane-1,3-dione was tested in a GLP study. The study was performed at pH 4, 7 and 9 (M-398574-01-2; 2004) at 50 °C in aqueous solution. Under the conditions of the test the substance was shown to be hydrolytically stable [t1/2 (25°C) > 1 year].

Phototransformation on soil is likely to contribute to the degradation of the test substance under outdoor conditions. Based on the experimental DT50 value of 3.9 days for irradiated samples, the half-life of the test substance under environmental conditions is calculated to be e.g. 10.4 solar summer days at Phoenix (Arizona, USA) or 16.1 solar summer days at Athens (Greece).

Biodegradation:

The substance is considered to be not readily biodegradable. However, the results of biodegradation studies in soil indicate that the substance is not expected to have a potential for accumulation in the environment under aerobic conditions. The calculated half-lives ranged between 2.7 and 18.3 days under the chosen test conditions, which correspond to temperature corrected DT50 values of 5.9 – 60.9 at 12°C (average environmental temperature in Europe).

Adsorption/desorption:

A study conducted under GLP and according to OECD guideline 106 and US EPA OPPTS 835.1220 is available (M-442744-01-1; 2012 and M-442744-02-1; 2014). Five different soils were used in this study.

The following table summarizes the key soil properties and results:

Soil origin

#1

#2

#3

#4

#5

Soil type (USDA)

Sandy loam

Silt loam

Loam

Loamy sand

Silt loam

pH (0.01MCaCl2)

5.1

6.3

7.3

5.9

5.2

Organic carbon [%]

2.0

2.9

4.4

2.0

2.9

KF(ads)[mL/g]

4.9

1.9

1.5

1.8

5.1

1/n

0.8740

0.8700

0.8515

0.8678

0.8681

KF,OC(ads)[mL/g]

246.7

66.4

33.7

63.5

175.0

 

Mean KF,OC(ads): 117 mL/g

Depending on the soil type the mobility of 2-{2-chloro-4-mesyl-3-[(tetrahydrofuran-2-ylmethoxy)methyl]benzoyl}cyclohexane-1,3-dione

can thus be classified as mobile or of low mobility.