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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Hydrolysis of chlorophenyl-labelled triflumuron was examined in sterile buffer solutions (pH 5, 7 and 9; 0.05 ppm; 25 °C) over a 30-day period. Triflumuron was stable at pH 5 and 7; the half-life was estimated to be 465 days at pH 7 and at pH 9 was 57 days. No volatile degradation products were found. The primary degradation product was 2-chlorobenzoic acid (CBA).


According to the water/sediment simulation study, triflumuron could be regarded as a rapidly dissipating compound from the water phase of a water/sediment system. Considering the total water/sediment system (i.e. an aquatic environment) triflumuron is quickly and thoroughly degraded as well as mineralised to CO2. Major metabolites identified in the water phase are 2-chlorobenzoic acid and 4-trifluoromethoxyphenyl urea. Major metabolites identified in sediments are 2-chlorobenzoic acid  and 4-trifluoromethoxyphenyl urea.


Triflumuron was found to degrade rapidly in a typical soil environment under aerobic laboratory conditions. The decline occurred with calculated DT50 values of 1.7 to 7.3 days in the three soils tested. Due to its short half-life, Triflumuron is unlikely to accumulate in viable soils and is rapidly degraded in typical agricultural soils under aerobic laboratory conditions. Therefore, the compound will not persist in a viable soil environment.


The Freundlich adsorption coefficients (KF) were determined for triflumuron in sandy loam, loamy sand, silty clay, and loam. The normalized adsorption coefficient (Koc) can be used to compare mobility tendencies in these soils. According to the classification of McCall et al and based on the results of this study, triflumuron is considered to immobile in soil types tested (mean classification from four soils), with a mean Koc value determined in this study of 13,209.


To assess the photochemical-oxidative degradation of triflumuron in the air a model calculation was performed according to a procedure developed by Atkinson, using the Atmospheric Oxidation Program (AOPWIN, version 1.90).
The chemical stability of Triflumuron in air is not determined by an attack at one single site, but at different parts of the molecule. This should result in the formation of various primary radicals leading to secondary oxidation products, which can be eliminated from the air by wet and/or dry deposition.
On account of the calculated chemical lifetime of Triflumuron in the air of at the most 1.2 days it is to be expected that the active ingredient can not be transported in gaseous phase over large distances and can not accumulate in the air. Thus, no difference in the behaviour between Triflumuron and other organic substances emitted into the air from natural sources (e.g. from plants, soil) is indicated.

Additional information