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Diss Factsheets
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EC number: 233-153-9 | CAS number: 10045-95-1
- 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
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 22 March 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: preliminary estimate of solubility by visual judgement with an investigation of the influence of pH variations.
- Key result
- Water solubility:
- > 1 020 - < 1 220 g/L
- Conc. based on:
- test mat.
- Temp.:
- 21 °C
- pH:
- 3.4
- Remarks on result:
- other: The test item was completely dissolved at 1020 g/L while precipitation was observed at 1220 g/L
- Water solubility:
- 1 000 g/L
- Temp.:
- 20.5 °C
- pH:
- 4.92
- Remarks on result:
- other: The test item was completely dissolved at 1000 g/L revealing no effect on solubility of a pH = ca.5
- Temp.:
- 21.3 °C
- pH:
- 6.98
- Remarks on result:
- other: A significant impact of pH=ca.7 was observed on solubility, the test item precipitating and giving a pasty solution. No maximum solubility could be determined.
- Details on results:
- Due to the high solubility observed during the assay without pH adjustment (i.e. pH = ca. 3.4), no definitive test was conducted. The experiments intended to investigate the pH effect were stopped after reaching the pH of 6.98 as it was not possible to reach a higher pH value due to the difficulty to homogenize the solution.
- Conclusions:
- Interpretation of results (migrated information): very soluble (> 10000 mg/L)
The substance is concluded to be very soluble in water with a maximum solubility in the range of 1.02 to 1.22 kg/L, at 20°C and pH 3.4. The maximum solubility did not change when increasing the pH to approx 5, while above (i.e. pH = 6.98, not possible to reach a pH > 7) the test item precipitated and the solution became pasty.
Reference
After a preliminary assay, the maximum solubility in demineralized water of neodymium trinitrate was determined to be between 1020 and 1220 g/L at 21°C. The pH of the solution was 3.4.
The influence of the pH increase was then investigated by adding sodium hydroxide to the solution of neodymium trinitrate at ca. 1020 g/L. After adjustment to pH = 4.92. Neodymium trinitrate was completely dissolved at a concentration of ca. 1000 g/L, taking the amount of sodium hydroxide added into account..
After subsequent addition of sodium hydroxide, a pH = 6.98 was obtained. The test item was not dissolved, the solution became pasty and a whitish precipitate was observed. It became difficult to homogenize the test mixture which never reached pH > 7. Although it can be concluded that increasing the pH will lower the water solubility, no maximum solubility could be determined at pH 7.
Description of key information
The substance is concluded to be very soluble in water with a maximum solubility in the range of 1.02 to 1.22 kg/L, at 20°C and pH 3.4. The maximum solubility did not change when increasing the pH to approx 5, while above (i.e. pH = 6.98, not possible to reach a pH > 7) the test item precipitated and the solution became pasty.
Key value for chemical safety assessment
- Water solubility:
- 1 200 g/L
- at the temperature of:
- 20 °C
Additional information
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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