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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Reference
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2007
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Reason / purpose:
reference to other study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Semi-static 72 h exposure tests where mussels were exposed to test solutions of n-octylbenzene (reference substance) and C12-14 branched alkylbenzenes.
Test organisms (species):
other aquatic mollusc: Mytilus edulis
Test type:
static
Water media type:
saltwater
Total exposure duration:
72 h
Test temperature:
15ºC
Duration:
72 h
Dose descriptor:
other: EC20
Effect conc.:
0.007 mg/L
Conc. based on:
test mat. (total fraction)
Basis for effect:
other: reduction in feeding rate
Validity criteria fulfilled:
not applicable
Conclusions:
The study allowed the authors to set an EC20 (72h): 0.007 mg/L that proved that the tested substance is toxic to mussels.

Description of key information

The result of one study in mussels (publication) has determined a EC20 (72h) of 0.007 mg/L, showing that BAB is toxic to this specie.

Other studies in similar subtances showed that there was no toxicity to daphnia for LAB (LC50 > water solubility in all assays) according to ECB (1997) and OECD (2002) dossiers, when excluding tests using a carrier solvent. Testing with use of solvents/dispersants is not environmentally relevant.

EPIsuite’s ECOSAR indicates that for neutral organics, if the log Kow is greater than 5.0, no acute effects in daphnia and mysid are predicted at saturation (due to the low water solubility). This is the case for BAB and all its components.

Key value for chemical safety assessment

EC50/LC50 for marine water invertebrates:
0.007 mg/L

Additional information