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Diss Factsheets
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EC number: 235-219-2 | CAS number: 12135-22-7
- 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
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: OECD 102/A1 Melting Freezing Temperature
- Principles of method if other than guideline:
- Differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- > 450 °C
- Conclusions:
- The melting/freezing point of palladium monoxide is > 450 °C
- Executive summary:
This is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint. The melting/freezing point of palladium monoxide is > 450°C
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 28 September 2010 to 2 December 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: OECD 101/A1 Melting Freezing Temperature
- Principles of method if other than guideline:
- Differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- 60
- Decomposition:
- yes
- Decomp. temp.:
- 60 °C
- Remarks on result:
- other: no melting below 450°C
- Conclusions:
- Palladium dihydroxide (solid only) decomposed at approximately 60 °C with no definitive signs of melting below 450°C
- Executive summary:
This is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint. Palladium dihydroxide (solid only) decomposed at 60 °C with no definitive signs of melting below 450°C
Referenceopen allclose all
The resulting powder residue on completion of each determination indicated the absence of any phase transition (ie melting) of the test item during heating up to 723K (>450 °C). The shallow, borad endotherm observed at approximately 60 to 140 °C in each determination was atrributed to dehydration of the test item, it having been supplied as a hydrate
As a result of the low rate of enthalpy change during decomposition, the onset temperatrue can only be approximated.
Similar thermographic profiles were obtained using air and nitorogen atmospheres; this indicates that the observed decomposition is probably thermal and not oxidative
Description of key information
Palladium dihydroxide decomposed at 60°C with no definitive signs of melting below 450°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 450 °C
Additional information
Walker and White (2011) is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint. Palladium dihydroxide decomposed at 60°C with no definitive signs of melting below 450°C.
Testing has also been conducted on a sample of ‘palladium monoxide (hydrate)’. Further assessment of the substance identity of the test item indicated that based on the analytical data this sample was the same substance as palladium dihydroxide. Studies conducted on the sample of ‘palladium monoxide (hydrate)’ are therefore included in the dossier for palladium dihydroxide. O'Connor and Woolley (2011) is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint. The melting point of palladium monoxide (hydrated solid) is > 450°C.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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