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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 619-447-3 | CAS number: 99607-70-2
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
Although no specific data is available for cloquintocet-mexyl for toxicity to terrestrial plants cloquintocet-mexyl is used on a wide range of plants as a safener (component of a herbicide plant protection product). Therefore, at application rates of up to 15 g/ha, cloquintocet-mexyl is considered to have no adverse effects on plants.
In order to fulfill the data requirement of Regulation (EC) no. 1907/2006, Annex IX, 9.4.3, OECD Guideline 208 (Terrestrial Plants Test: Seedling Emergence and Seedling Growth Test) testing is proposed by Syngenta Ltd (lead registrant). This additional test is only needed in order to fulfill the data requirement but is not needed as a consequence of the chemical safety assessment.
According to Regulation (EC) no. 1907/2006, Annex IX, 9.4, column 2, long-term studies should be considered for substances that have a high potential to adsorb to soil. Background from Guidance on information requirements and chemical safety assessment, Chapter R.7c, May 2008): "Some substances present a particular concern for soil, such as those substances that show a high potential to partition to soil, and hence may reach high concentrations, or those that are persistent". Koc is considered as the relevant parameter to describe the adsorption potential to soils. For cloquintocet-mexyl log Koc is 4.1 (based on mean Koc of 12850 mL/g), thus log Koc is below 5. Therefore the substance does not qualify for "highly adsorptive". In addition the substance degrades very rapidly in soil, thus its accumulation potential is very small. As a consequence no long-term plant study is proposed.
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.
