Registration Dossier
Registration Dossier
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EC number: 927-033-1 | CAS number: 1174918-88-7
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
EL50 (72 h) = 10 mg/L growth rate (Raphidocelis)
EL50 (72 h) = 10 mg/L biomass (Raphidocelis)
NOELR (72 h) = 6.3 mg/L growth rate (Raphidocelis)
NOELR (72 h) = 6.3 mg/L biomass (Raphidocelis)
NOELR (72 h) < 1 mg/L biomass (Raphidocelis)
Key value for chemical safety assessment
Additional information
No studies are available on the toxicity to aquatic algae for hydrocarbons, C7-C8, cyclics. Based on a category approach data are read-across to hydrocarbons, C7-C9, n-alkanes, isoalkanes, cyclics. 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 and biomass to Raphidocelis, 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 to Raphidocelis at 10-30 mg/L measured as growth inhibition and biomass (Shell 1995) and 29 mg/L and 12 mg/L measured as growth inhibition and biomass, respectively (Shell 2000), based on nominal loadings of the test substance in water. For growth inhibition and biomass the NOELR was determined to be 10 mg/L in the study by Shell (1995) and 6.3 mg/L according to Shell (2000).
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