Registration Dossier
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EC number: 920-750-0 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
EL50 (72 h) = 10 - 30 mg/L growth rate (Raphidocelis)
EL50 (72 h) = 10 - 30 mg/L biomass (Raphidocelis)
NOELR (72 h) = 6.3 mg/L growth rate (Raphidocelis)
NOEL (72 h) = 6.3 mg/L biomass (Raphidocelis)
NOEL (72 h) < 1 mg/L biomass (Raphidocelis)
Key value for chemical safety assessment
Additional information
Two studies conducted according to OECD 201 guideline are available on the toxicity to aquatic algae for hydrocarbons, C7-C9, n-alkanes, isoalkanes, cyclics (Shell 1995, 2000). The toxicity, as measured by inhibition of growth rate toPseudokirchnerella subcapitata, was evaluated in freshwater by using water accomodated fractions (WAFs). Under the conditions of these studies, the test substance, hydrocarbons, C7-C9, n-alkanes, isoalkanes, cyclics produced toxicity toPseudokirchnerella subcapitataat 10-30 mg/L measured as growth inhibition (Shell 1995, Shell 2000), based on nominal loadings of the test substance in water. For growth inhibition the NOELR was determined to be 10 mg/L (Shell 1995) and 6.3 mg/L (Shell 2000).
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