Registration Dossier
Registration Dossier
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EC number: 217-443-2 | CAS number: 1852-17-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability acutely not harmful to aquatic algae.
Key value for chemical safety assessment
Additional information
Only one study on fish is currently available for the aquatic toxicity assessment of the test substance. Due to the test compounds structural similarities and alike physico-chemical properties compared to ethylene urea (CAS 120-93-4), which has only one additional carbon-atom in the cyclic part of the molecule, ethylene urea can be considered as an structural analogue adequate for read-across (SMILES code for ethylene urea: O=C(NCC1)N1; SMILES code for propylene urea: O=C1NCCCN1).
The outcome of a publication is available for the hazard assessment of the read-across substance ethylene urea to Chlorella pyrenoidosa. The EC50 (based on the growth rate after 96 hours) value was determined to be 16000 mg/L (Van Leeuwen 1985). Therefore, the test substance is considered likewise with high probability acutely not harmful to aquatic algae.
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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