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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

short-term toxicity to aquatic invertebrates
Type of information:
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model, but not (completely) falling into its applicability domain, with adequate and reliable documentation / justification
QSAR value. The substance falls within the applicability domain of the model and was therefore reliably predicted for its acute toxicity (48h-EC50) to daphnid. Therefore, this endpoint value can be considered valid for use in risk assessment and classification and labelling.
other: REACH Guidance on QSARs R.6 (following OCDE 202, EU C.2)
Principles of method if other than guideline:
Not required
GLP compliance:
not specified
Specific details on test material used for the study:
Smile : C=CCCCCCCCCC(=O)[O-].[Na+]
Analytical monitoring:
not required
Details on sampling:
Not applicable
not specified
Details on test solutions:
Not applicable
Test organisms (species):
Daphnia sp.
Details on test organisms:
Not applicable
Test type:
other: Not applicable
Water media type:
other: Not applicable
Limit test:
Total exposure duration:
48 h
Remarks on exposure duration:
Not applicable
Post exposure observation period:
Not applicable
Not applicable
Test temperature:
Not applicable
Not applicable
Dissolved oxygen:
Not applicable
Not applicable
Not applicable
Nominal and measured concentrations:
Not applicable
Details on test conditions:
Not applicable
Key result
48 h
Dose descriptor:
Effect conc.:
ca. 39 mg/L
Nominal / measured:
Conc. based on:
test mat.
Basis for effect:
Remarks on result:
other: QSAR predicted value
Details on results:
Not applicable
Results with reference substance (positive control):
Not applicable
Reported statistics and error estimates:
95% confidence limits (α = 0.05): 19 – 77 mg/L
Validity criteria fulfilled:
Executive summary:

The 48h-EC50 of undec-10-enoic acid to daphnids was predicted as 39 mg/L (19 – 77 mg/L)

Description of key information

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
39 mg/L

Additional information