Registration Dossier
Registration Dossier
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EC number: 295-653-3 | CAS number: 92113-48-9
Endpoint summary
Administrative data
Description of key information
Additional information
Fatty acids, C14-18 and C16-18-unsatd., mixed esters with castor oil, castor oil fatty acids, 2-ethylhexanoic acid and 2,2-bis(hydroxymethyl)-1-butanol (CAS No. 92113-48-9) is a substance of unknown, variable composition or biological origin (UVCB). The substance is hydrolytically stable and therefore abiotic hydrolysis is not a relevant pathway in water. However, the substance is readily biodegradable and will rapidly be removed from natural water compartments as well as from wastewater in sewage treatment plants. The substance has a log Koc > 5 indicating a potential to adsorb to soil and sediment particles. Indirect photodegradation is not an important environmental fate process since the substance is not expected to evaporate into the atmosphere due to its very low vapor pressure of < 0.01 Pa at 20 °C. Due to its low water solubility (< 1 mg/L in aqua bidest), ready biodegradability and potential for adsorption to soil and sediment particles, only low concentrations of this substance are expected to be released into the aquatic environment. The substance will be bioavailable to aquatic organisms mainly via feed and contact with suspended organic particles.
Fatty acids, C14-18 and C16-18-unsatd., mixed esters with castor oil, castor oil fatty acids, 2-ethylhexanoic acid and 2,2-bis(hydroxymethyl)-1-butanol (CAS No. 92113-48-9) is not bioaccumulative, based on the criteria given in Regulation (EC) No. 1907/2006, Annex XIII, 1.1.2 (BCF < 2000 L/kg). After uptake by fish species, extensive and fast biotransformation of the substance by carboxylesterases into 2 ethylhexanoic acid and the corresponding alcohol is expected. BCF/BAF values estimated with the BCFBAF v3.01 program, Arnot-Gobas model including biotransformation; also indicate that this substance will not be bioaccumulative.
In conclusion, Fatty acids, C14-18 and C16-18-unsatd., mixed esters with castor oil, castor oil fatty acids, 2-ethylhexanoic acid and 2,2-bis(hydroxymethyl)-1-butanol (CAS No. 92113-48-9) is effectively removed from the environment by biotic degradation processes. Due the low water solubility and high adsorption potential, the main route of exposure for aquatic organisms such as fish will be via food ingestion or contact with suspended solids. Ingested amounts of the substance in organisms are expected to be effectively metabolized to 2 ethylhexanoic acid and the respective fatty alcohols.
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.
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