Registration Dossier

Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

EL50 (48 h) = 0.66 mg/L (Daphnia) (freshwater)
EL50 (24 h) = 0.4 mg/L (Artemia) (saltwater)

Key value for chemical safety assessment

Additional information

There are measured acute toxicity data available for octane on five different species of freshwater and marine aquatic species including the genera Daphnia, Chaetogammarus, Mysidopsis, Mytilus and Artemia (Adema & van den Bos Bakker 1987, Bobra et al. 1983, Donkin et al. 1989, Abernethy et al. 1986). In none of these studies a standard test guideline was followed. However, tests by Adema & van den Bos Bakker were conducted similar to OECD 202 and are considered to be the most reliable. The acute toxicity, as measured by immobilisation (Daphnia, Artemia), feeding activity (Mytilus) or mortality (Chaetogammarus, Mysidopsis), was evaluated in fresh- and saltwater by using water accomodated fractions (WAFs). Under the conditions of these tests, octane produced acute toxicities to Daphnia at 0.66 mg/L (48 h) (Adema & van den Bos Bakker 1987) and 0.38 mg/L (48 h) (Bobra et al. 1983), to Chaetogammarus and Mysidopsis at 0.66 mg/L (48 h) (Adema & van den Bos Bakker 1987), to Mytilus at 0.12 mg/L (105 min) (Donkin et al. 1989), and to Artemia at 0.4 mg/L (24 h) (Abernethy et al. 1986) based on nominal loadings of the test substance in water.