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EC number: 237-859-8 | CAS number: 14024-61-4
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
- Endpoint:
- short-term toxicity to aquatic invertebrates
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Good-quality, well-documented study in accordance with OECD guideline. Study was conducted according to GLP and has a reliability score of 1 (reliable without restriction).
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.2 (Acute Toxicity for Daphnia)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- WCA-002/4-20/G
- Analytical monitoring:
- yes
- Details on sampling:
- Sampling at test start before distribution to replicates and sampling of aged test solution by pooling replicate concentration samples.
- Vehicle:
- no
- Details on test solutions:
- - Stock concentration: 10 mg/L
- Stock preparation method: stirred slowly for 48h at ca. 20C, followed by 1h resting period to separate suspended particles from aqueous phase before use - Test organisms (species):
- Daphnia magna
- Details on test organisms:
- - Strain: Clone V
- Source: Fraunhofer IME
- Age at study initiation (mean and range, SD): 4-24hr
- Feeding during test: no - Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 48 h
- Hardness:
- 70-120 mg/L as CaCO3 - below recommended range; historical conditions at laboratory indicate that this range is acceptable for the Daphnia magna strain used at the IME
- Test temperature:
- 20.4-20.6 degrees Celsius
- pH:
- 8.2-8.4
- Dissolved oxygen:
- 8.4-8.7 mg/L
- Nominal and measured concentrations:
- Nominal concentration (mg/L): 0.20, 0.43, 0.94, 2.07, 4.55, 10
Pd concentration (mg Pd/L): 0.07, 0.15, 0.33, 0.72, 1.59, 3.50 - Details on test conditions:
- - Test vessel: glass beaker
- Type (delete if not applicable): open
- Material, size, headspace, fill volume: 50mL
- Aeration: no
- No. of organisms per vessel: 5
- No. of vessels per concentration (replicates):4
- Control: dilution water
- Light intensity:9.9-10.0 uE/m2/s
- Light/dark cycle:16/8
All OECD guidelines on water quality were met, except for water hardness. - Reference substance (positive control):
- yes
- Remarks:
- Potassium dichromate
- Key result
- Duration:
- 48 h
- Dose descriptor:
- EC50
- Effect conc.:
- 0.217 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- morphology
- Remarks on result:
- other: 95% CL: 0.177 - 0.269 mg/L
- Duration:
- 48 h
- Dose descriptor:
- EC10
- Effect conc.:
- 0.126 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mortality
- Remarks on result:
- other: 95% CL: 0.081 - 0.0158 mg/L
- Duration:
- 48 h
- Dose descriptor:
- NOEC
- Effect conc.:
- <= 0.105 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mortality
- Duration:
- 48 h
- Dose descriptor:
- LOEC
- Effect conc.:
- <= 0.225 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mortality
- Details on results:
- No significant signs of distress or disease were observed.
- Results with reference substance (positive control):
- 24h EC50 immobilisation with K2Cr2O7: 1.19 mg/L
95% CL: 1.08-1.36 mg/L - Reported statistics and error estimates:
- 95% confidence intervals calculated by Probit-analysis, assuming log-normal distribution of the values.
Statistical calculations performed with ToxRat. - Validity criteria fulfilled:
- yes
- Conclusions:
- Palladium di(4-oxopent-2-en-2-oate) impaired Daphnia magna under the chosen test conditions. The EC50 was found to be 0.217 (95 % CL: 0.177 – 0.269) mg/L. The NOEC was found to be 0.105 mg/L.
- Executive summary:
The influence of palladium di(4-oxopent-2-en-2-oate) on the mortality of the species Daphnia magna was investigated according to OECD guideline 202 and EC method C.2. The daphnids were placed in water containing the test item in a nominal concentration range of 0.2 to 10 mg test item per litre, corresponding to a measured concentration range of 0.07 to 3.50 mg Pd per litre. The test was conducted under static conditions for 48 h. No significantly increased mortality (NOEC) up to a concentration of 0.105 mg palladium di(4-oxopent-2-en-2-oate) per litre was detected when compared to the control daphnids. The EC50 for the tested species was found to be 0.217 (95 % CL: 0.177 – 0.269) mg palladium di(4-oxopent-2-en-2-oate) per litre. No other significant signs of disease or distress were observed in the test specimen.
The study was conducted in accordance with GLP and all validation criteria were met. This study has been given a reliability rating of 1 as being well-documented and adhering to guideline procedures.
Reference
Mortality | |
NOEC | 0.105 |
LOEC | 0.225 |
EC10 (95% CL) |
0.126 (0.081 -0.158) |
EC20 (95% CL) | 0.152 (0.109 -0.185) |
EC50 (95% CL) | 0.217 (0.177 -0.269) |
Description of key information
The EC50 value was determined to be 0.217 mg test item/L (0.076 mg Pd L-1).
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 0.217 mg/L
Additional information
An acute Daphnia magna study is available for palladium di(4-oxopent-2-en-2-oate) (Simon 2014). The study followed OECD guideline 202, with six test concentrations. Test solutions were analysed and were within 50 and 61% of nominal at in new and aged solutions. As test concentrations were stable but less than 80% of nominal, results were based on initial measured concentrations. The EC50 value was determined to be 0.217 mg test item/L (0.076 mg Pd L-1).
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