Registration Dossier
Registration Dossier
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EC number: 204-211-0 | CAS number: 117-81-7
Toxicity to aquatic plants other than algae
Administrative data
- Endpoint:
- toxicity to aquatic plants other than algae
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- other: 3b: Significant methodological defficiencies Concentration tested irrealist, evidence of undissolved substance.
Data source
Referenceopen allclose all
- Reference Type:
- secondary source
- Title:
- Comparison of static-replacement and flow-through bioassays using duckweed, Lemna gibba G-3.
- Author:
- Davis JA
- Year:
- 1 981
- Bibliographic source:
- US EPA, Report. No. 560/6-81-003, 89.
- Reference Type:
- other: Risk assessment report
- Title:
- Unnamed
- Year:
- 2 008
Materials and methods
- Principles of method if other than guideline:
- Inhibition of growth of Lemna gibba during 7 days exposure in semi static conditions.
Test material
- Reference substance name:
- Bis(2-ethylhexyl) phthalate
- EC Number:
- 204-211-0
- EC Name:
- Bis(2-ethylhexyl) phthalate
- Cas Number:
- 117-81-7
- Molecular formula:
- C24H38O4
- IUPAC Name:
- 1,2-bis(2-ethylhexyl) benzene-1,2-dicarboxylate
Constituent 1
Results and discussion
Effect concentrations
- Duration:
- 7 d
- Dose descriptor:
- EC50
- Effect conc.:
- > 397 - < 7 582 mg/L
- Nominal / measured:
- nominal
- Details on results:
- The long-term (7d) nominal EC50-values between 397
and 7,582 mg/l, reported for the macrophyte Lemna gibba (Davis, 1981) are several orders of
magnitude above the apparent solubility of DEHP. The actual effect concentrations in these tests
were therefore most likely lower than the reported. In addition, the comment that the toxicant formed oil droplets etc. further supports that the actual concentration of dissolved DEHP in this study, was considerably lower than the nominal values. This might also indicate that the observed effects were due to physical effects, not relevant for environmental exposure conditions.
Applicant's summary and conclusion
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