Registration Dossier
Registration Dossier
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EC number: 931-433-1 | CAS number: 8002-26-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
A 72h EL50 of > 100 mg/L and NOELR of ≥100 mg/L have been determined for the effect of the test substance on growth rate and biomass of Desmodesmus subspicatus. These values are the lowest of those obtained in five equally reliable tests conducted on different samples of Crude Tall Oil (CTO).
CTO is a UVCB substance and compositional information has been used in conjunction with validated QSARs to derive No Observed Effect Concentrations (NOECs) for its constituent blocks. Calculation of long-term PNECs for the aquatic compartment will be based on data for the constituent blocks rather than on data for the whole substance. Further testing for long-term toxicity to aquatic algae will therefore not contribute to the database that is required to complete the assessment of the substance.
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.
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