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EC number: 247-117-5 | CAS number: 25583-20-4
- 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

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:
- 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media
- Deviations:
- no
- GLP compliance:
- not specified
- Type of method:
- other: transformation/dissolution
- Water solubility:
- 8.77 µg/L
- Temp.:
- 21.5 °C
- pH:
- 6
- Remarks on result:
- other: T/D pre-test (loading 100 mg/L) at pH 6: After 24 h the mean concentrations were: 8.77 ± 4.23 μg Ti/L and 8.76 ± 4.46 μg NH3/L
- Water solubility:
- < 0.083 µg/L
- Temp.:
- 21.5 °C
- pH:
- 8
- Remarks on result:
- other: T/D pre-test (loading 100 mg/L) at pH 8: After 24 h the mean concentrations were < LOD (LOD = 0.083 μg Ti/L) and 11.6 ± 4.7 μg NH3/L
- Water solubility:
- ca. 7.76 µg/L
- Temp.:
- 21.5 °C
- pH:
- ca. 6
- Remarks on result:
- other: T/D main test (loading 10 mg/L) at pH 6: After 7 days the mean concentrations were: 7.76 ± 2.82 μg Ti/L and 9.74 ± 0.98 μg NH3/L
- Water solubility:
- < 0.197 µg/L
- Temp.:
- 21.5 °C
- pH:
- ca. 6
- Remarks on result:
- other: T/D main test (loading 1 mg/L) at pH 6: After 28 days the mean concentrations were < 0.197 μg Ti/L and 12.1 ± 0.7 μg NH3/L
- Water solubility:
- ca. 23.8
- Temp.:
- 21.5
- pH:
- 6
- Remarks on result:
- other: T/D main test (loading 100 mg/L) at pH 6: After 7 days the mean concentrations were: 23.8 ± 6.6 μg Ti/L and 20.6 ± 4.9 μg NH3/L
- Details on results:
- The screening test showed, that the titanium release is higher at pH 6 than at pH 8 after 24 hours.
Due to the higher solubility at pH 6 the full T/D test was performed at this pH. After 7 or 28 days, as appropriate, titanium and ammonium concentrations were measured. - Conclusions:
- In conclusion, the results showed that the highest measured solubility (with 100 mg/L loading and pH 6) after 7 days was 23.8 ± 6.6 μg Ti/L.
- Executive summary:
A transformation/dissolution (T/D) test, in accordance with OECD Series on Testing and Assessment No. 29, was carried out to study the potential of titanium nitride (100% purity) to release metal ions into the environment. A 24-hour screening test was conducted to determine the pH of maximum titanium release at pH 6 and 8 with a loading rate of 100 mg/L. Based on the results, a full main test was performed at pH 6. Under the described conditions the mean titanium concentration after 28 days with a loading rate of 1 mg/L was < 0.197 µg/L, after 7 days with a loading rate of 10 mg/L the mean titanium concentration was 7.76 µg/L and after 7 days with a loading rate of 100 mg/L the mean concentration of titanium was 23.8 µg/L.
Reference
Description of key information
Titanium nitride was tested in accordance with OECD Guidance Document No. 29 (transformation/dissolution test). The highest solubility was measured with a loading rate of 100 mg/L at pH 6 after 7 days, which was 23.8 µg Ti/L.
Key value for chemical safety assessment
- Water solubility:
- 23.8 µg/L
- at the temperature of:
- 21.5 °C
Additional information
A transformation/dissolution test in accordance with OECD guidance document No. 29 was carried out to study the potential of titanium nitride (100% purity) to release metal ions into the environment. A 24-hour screening test was conducted to determine the pH of maximum titanium release. Based on the results, a full main test was performed at pH 6. The mean titanium concentration after 28 days with a loading rate of 1 mg/L was < 0.197 µg/L, after 7 days with a loading rate of 10 mg/L the mean titanium concentration was 7.76 µg/L and after 7 days with a loading rate of 100 mg/L the mean concentration of titanium was 23.8 µg/L.
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