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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 215-304-0 | CAS number: 1320-51-0
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The 96h-LC50 is >1000 mg/L in a OECD guideline 203 test with Oncorhynchus mykiss under GLP (reliability 2, no specific chemical analysis).
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 1 000 mg/L
Additional information
The acute toxicity of (hydroxyethyl)urea to the Rainbow Trout, Oncorhynchus mykiss, was determined under static conditions according to OECD test guideline 203.
After 96 hours of exposure, there was no mortality in the control or treatments. The 96-hour LC50 was estimated to be 1000 mg a.i./L, the highest concentration tested based on nominal concentrations. No subleathal effects were observed. The no observed-effect concentration (NOEC) was 1000 mg a.i./L, the highest concentration tested.
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.
