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European Union - Final Regulatory Action
triflumuron CAS number:
64628-44-0
Date circular:
12/06/2024

Chemical name: 1-(2-chlorobenzoyl)-3-[4-trifluoromethoxyphenyl] urea

Final regulatory action has been taken for the category: Pesticide

Final regulatory action: The chemical is Banned

Use or uses prohibited by the final regulatory action: Use as an active substance in biocidal products for product-type 18 (Insecticides, acaricides and products to control other arthropods).

Not relevant

Use or uses that remain allowed:

Not relevant

Pesticide use or uses that remain allowed: Not relevant

The final regulatory action was based on a risk or hazard evaluation: Yes

Summary of the final regulatory action: Triflumuron has not been approved as an active substance for use in biocidal products for product-type 18 (insecticides, acaricides and products to control other arthropods) in accordance with Regulation (EU) No 528/2012 of the European Parliament and of the Council of 22 May 2012 concerning the making available on the market and use of biocidal products (BPR). No other uses of triflumuron as an active substance in biocidal products are approved in the EU. As a result, it is prohibited to place on the market or use biocidal products containing triflumuron.

The reasons for the final regulatory action were relevant to: Environment

Summary of known hazards and risks to human health:

Not relevant

Expected effect of the final regulatory action in relation to human health:

Not relevant

Summary of known hazards and risks to the environment:

The risk evaluation for triflumuron was carried out for the use in biocidal products as an insecticide for the control of the house fly (Musca domestica) and litter beetle (Alphitobius diaperinus) indoors by professional users, in livestock and poultry houses. It is applied to locations in livestock and poultry houses where insects breed such as litter, the surface of manure, cesspools and bedding materials. Triflumuron is intended to be used by means of two different application methods: spraying and watering can. The latter is used only in small farms therefore can be considered as a marginal use.

With regard to the environmental risk assessment conducted in the context of the application for the approval of triflumuron, the following can be concluded:

For the spraying and watering can application unacceptable risks are identified for several compartments for triflumuron as well as for the metabolites. For both uses spraying and watering can application, an unacceptable risk was identified for the soil compartment and the aquatic compartment (sediment and surface water). As regards the metabolites, an unacceptable risk in surface water was identified for the spraying application. Consequently, these applications cannot be regarded as safe uses. No risk mitigation measures can be applied to refine these unacceptable risks.

For the treatment of manure heaps in poultry farms with laying hens in battery cages with aeration followed by composting the use is considered too limited for approval because:

o The risk is acceptable only for one application per year. Because the active substance degrades in manure, re-colonisation is possible when the concentrations drop below efficacious levels. Re-application with the same substance or a substance with a similar action acting on insect larvae is therefore required considering that flies rapidly develop from egg to adult (the default value used in similar evaluations according to the Emission Scenario Document for Insecticides for stables and manure Storage System is 4). Therefore, one application per year is not realistic.

o The risk is acceptable only if a hot phase is assumed in the composting process. It cannot be guaranteed that this will occur in practice in poultry farms. For other active substances no unacceptable risks were identified without including the hot phase.

o The risk is acceptable only if the resulting manure is applied to arable land. It cannot be guaranteed that in practice the resulting manure will not be applied to grassland.

In view of the conclusions of the evaluation, that:

1. for the spraying and watering can application unacceptable risks, which cannot be mitigated, are identified for several compartments for triflumuron as well as for the metabolites. Consequently, these applications cannot be regarded as safe uses;

2. for the treatment of manure heaps in poultry farms with laying hens in battery cages with aeration followed by composting the limitations for the risks to be acceptable are not realistic and therefore the conditions of use for the biocidal product cannot be considered representative;

it is concluded that biocidal products containing triflumuron as an active substance may not be expected to meet the criteria laid down in point (b) of Article 19(1)(b)(iv) of Regulation (EU) No 528/2012. Subsequently, it is proposed that triflumuron shall not be approved and included in the Union list of approved active substances.

Expected effect of the final regulatory action in relation to the environment:

Reduction of risk for the environment from the use of biocidal products containing triflumuron.

Date of entry into force of the final regulatory action: 19/10/2015