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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 500-116-6 | CAS number: 52609-19-5 1 - 2.5 moles ethoxylated
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Bioaccumulation in organisms is negligible, due to biotransformation and excretion of alcohol ethoxylates.
Key value for chemical safety assessment
Additional information
In a publication on the bioconcentration of alkylethoxylates Tolls et al. (2000) reported BCF-values ranging from <5 to 387.5 whereas uptake rates varied from 330 to 1660 (L x kg/d) and elimination rates varied from 3.3 to 59 per day. The authors stated that the time of steady state and the BCF for AE increase with increasing chain length of alkyl chain and decreasing length of the ethoxylate chain. The alcohol ethoxylate with alkyl-chain length comparable to the given substance is C16EO8. For this alcohol ethoxylate Tolls et al. (2000) reported a BCF-value of 387.5 L/kg.
The authors further concluded that the high values of elimination rate constants suggest that the tested fathead minnow efficiently biotransform alcohol ethoxylate, thereby preventing them from attaining high concentrations in fish.
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.
