Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 939-607-9 | CAS number: 1474044-65-9
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
The 16 day EC50 values in soil based on the effect on emergence and growth were 537, 634 and 1,960 mg a.i./kg dw for S. alba, T. pratense and T. aestivum, respectively, while those in sand were 73, 74 and 141 mg a.i./kg dw, respectively. In sand, toxic effects were seen at lower concentrations than in soil. This was probably due to the lower bioavailability of the test substance in soil caused by stronger adsorption. Furthermore, as the toxicity to terrestrial plants in sand is not representative of the natural environment, the EC50 in natural soil was considered as a reasonable worst case for terrestrial plant species.
Key value for chemical safety assessment
- Short-term EC50 or LC50 for terrestrial plants:
- 537 mg/kg soil dw
Additional information
A guideline seedling emergence and seedling growth test was conducted to determine the adverse effects of the read-across substance C12-16 ADBAC on terrestrial plants. Sinapis alba, Trifolium pratense and Triticum aestivum were used. The substance was tested with 40 plants per replicate per dose using 4 replicates for 16 days. The study was performed using natural soil and sand at the following concentrations:
- Natural soil: 0, 476.6, 856.2, 1540.9, 2772.2 and 4990.0 mg/kg
- Sand: 0, 28.8, 55.8, 93.4, 166.8 and 300.5 mg/kg
Analytical determination of the test substance was performed. The test was considered valid on the basis of percent emergence and further growth of the plant in the water control. Effects deviated between quartz sand and natural soil; in sand, toxic effects were seen at lower concentrations than in soil. This was probably due to the lower bioavailability of test substance in soil caused by stronger adsorption. The extraction of the active substance proved that the natural soil had a strong sorbing effect and total recovery was not achieved even when acidified methanol was used as an extraction solvent. That was not the case with quartz sand. The 16 day EC50 values in soil based on the effect on emergence and growth were 537, 634 and 1,960 mg a.i./kg dw for S. alba, T. pratense and T. aestivum, respectively, while those in sand were 73, 74 and 141 mg a.i./kg dw, respectively (Servajean E, 2004).
There were great deviations between quartz sand and natural soil. In sand, toxic effects were seen at lower concentrations than in soil.This was probably due to the lower bioavailability of test substance in soil caused by stronger adsorption. Further, as the toxicity to terrestrial plants in sand is not representative of the natural environment, the EC50 in natural soil can be considered as a reasonable worst case for terrestrial plant species.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
