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Diss Factsheets
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EC number: 231-726-8 | CAS number: 7704-98-5
- 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
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Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- transformation / dissolution of metals and inorganic metal compounds
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- - Start of the test period: 02.08.2016 - End of the test period: 17.11.2016
- Reliability:
- 1 (reliable without restriction)
- 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:
- yes
- Remarks:
- See below description of the methods
- Principles of method if other than guideline:
- 1) Preliminary test
In order to determine an appropriate pH of the dissolution medium a preliminary test according to paragraph 26 of OECD 29 was performed. 100 ml glass bottles were filled with 50 ml of aqueous buffer solution at pH 5,5, pH 7 and pH 8,5, each in duplicate. A sample amount of approx. 5 mg was weighed under Argon atmosphere and suspended in the buffer solution at 23 °C. After 2 days a filtered aliquot of each bottle was analyzed for Titanium content by ICP-OES according to EN ISO 11885.
2) Full test (7 and 28 days)
- For the full test according to paragraphs 34 and 35 of OECD 29 a buffered aqueous solution with pH 6 was chosen in order to maximize the potential of dissolution. 600 ml glass bottles were filled with 500 ml of the buffer medium. After a half-hour equilibrium phase pH, temperature and dissolved oxygen concentration of each vessel were measured. Duplicate aliquots of each vessel were taken in order to determine the background metal concentration of the medium by ICP-OES according to EN ISO 11885.
- Three different loadings of the test substance were prepared (1 mg/l, 10 mg/l, 100 mg/l), each in triplicate. An appropriate sample amount was weighed under Argon atmosphere into the buffer. The closed glass bottles were gently moved in a temperature controlled cabinet in the dark at 23 °C for the entire test duration of 29 days.
- At established time intervals the bottles were visually inspected and duplicate sample aliquots were taken for quantitative analysis of the Titanium concentration. In order to prevent sample particles from being transferred to the analytical process all aliquots were filtered through 0,2 μm regenerated Cellulose membrane syringe filter. For each aliquot temperature, pH and dissolved oxygen were determined as well.
- The agitation period startet on 16.08.2016, 12:30. Sampling at the short term endpoint was on 23.08.2016, 13:00. Sampling at the long term endpoint was on 14.09.2016, 10:30. Undissolved substance was still visible at the bottom of each bottle at the end of the test period.
Note:
- pH was determined by an electronic pH-meter, device Metrohm 781
- Dissolved oxygen concentration was determined according to DIN EN 25813. - GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
- Type of method:
- other: See above
- Specific details on test material used for the study:
- * Sample: Titanium hydride VM, Batch N° 75727
* Appearance: Grey powder
* Container: Metal can, 200 mL - Key result
- Water solubility:
- < 0.1 mg/L
- Conc. based on:
- element
- Remarks:
- titanium
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- ca. 29 d
- Temp.:
- 23 °C
- pH:
- 5.8
- Water solubility:
- < 0.1 mg/L
- Conc. based on:
- element
- Remarks:
- Titanium
- Loading of aqueous phase:
- 10 mg/L
- Incubation duration:
- ca. 29 d
- Temp.:
- 23 °C
- pH:
- 5.8
- Water solubility:
- < 0.1 mg/L
- Conc. based on:
- element
- Remarks:
- Titanium
- Loading of aqueous phase:
- 100 mg/L
- Incubation duration:
- ca. 29 d
- Temp.:
- 23 °C
- pH:
- 5.8
- Conclusions:
- The water solubility of titanium hydride (TiH2) following the OECD guideline n°29: "transformation/dissolution of metals and metal compounds in aquaeous media" was found below the detection limit (<0.10 mgTi/L).
As a final conclusion of all data it can be stated that the test substance Titanium hydride is insoluble in water.
Reference
Description of key information
The water solubility of titanium hydride (TiH2) has been determined by conducting the OECD guideline n°29: "transformation/dissolution of metals and metal compounds in aquaeous media". The water solubility of TiH2 was found below the detection limit (<0.10 mgTi/L).
As a final conclusion, it can be stated that the test substance Titanium hydride is insoluble in water.
Key value for chemical safety assessment
- Water solubility:
- 0.1 mg/L
- at the temperature of:
- 23 °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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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