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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 205-251-1 | CAS number: 136-53-8
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
For the substance as such, zinc bis(2-ethylhexanoate), no aquatic toxicity studies are available. Thus, read-across to the assessment entities soluble zinc substances and 2-ethylhexanoic acid is applied since the ions of zinc bis(2-ethylhexanoate) determine its fate and toxicity in the environment.
Zinc: Data on 7 freshwater species are available and the corresponding species NOECs range from 0.044 to 0.530 mg Zn/L (dissolved). Data for one marine species is available with a NOEC of 0.025 mg Zn/L (dissolved). The respective species NOEC/EC10 values are applied in the species sensitivity distribution approach.
2-ethylhexanoic acid: Regarding the long-term toxicity of 2-ethylhexanoate to freshwater fish, further testing is not considered to provide more insight into the environmental toxicity since (i) 2-ethylhexanoate has a low potential for aquatic toxicity, and (ii) is readily biodegradable. Further, NOEC/EC10 values for long-term toxicity to the acutely more sensitive aquatic invertebrates are well above the respective OECD test limit. According to the QSAR-based estimates of the model ECOSAR v.2.0, 2-ethylhexanoate has a very low potential for chronic toxicity to freshwater and saltwater fish with respective chronic values (ChV = 10^([log (LOEC x NOEC)]/2)) of 17.7 and 40.2 mg/L being well above 15 mg/L. Thus, long-term toxicity of 2 -ethylhexanoate to fish is highly unlikely.
Thus, zinc bis(2-ethylhexanoate) has some potential for long-term toxicity to marine and freshwater fish.
Key value for chemical safety assessment
Additional information
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.
