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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Toxicity to soil macroorganisms: A chronic earthworm study was conducted to determine the effect of Pencycuron on reproduction of the earthworm Eisenia fetida in a laboratory test. Reproduction was determined after 56 day, resulting in the NOEC of ≥3.3 mg a.s./kg soil dw.


Toxicity to terrestrial plants:

Seedling emergence study: Following a soil surface (pre-emergence) and foliage (post-emergence) application of Pencycuron at 250 to 7500 g a.s./ha to 11 terrestrial plant species. None of the 11 plant species showed phytotoxic effects up to the proposed maximum seasonal spray application rate of 7500 g a.s./ha. The NOER was determined to be 7500 g/ ha (corresponding to 2.5 mg/kg soil dw).


Toxicity to soil microorganisms: The purpose of this study was to determine the effects of Pencycuron on the activity of soil microflora with regard to nitrogen transformation in a laboratory test. A loamy sand soil was exposed for 42 days to 2.0 and 10.0 mg/kg soil dw. Pencycuron caused no adverse effects (difference to control <25%) on the soil nitrogen transformation (measured as NO3-N production) at the end of the 42-day incubation period. The NOEC was determined to be ≥10.0 mg/kg soil dw.


Toxicity to birds: The objective of the study was to investigate the effect of dietary exposure of Pencycuron on Japanese quail's reproduction. The NOEC was determined to be 122.1 mg/kg bw/d.

Additional information