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EC number: 236-293-9 | CAS number: 13283-01-7
- 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
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:
- 2017-07-17 to 2017-10-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Combination of guideline studies
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Version / remarks:
- dated July 27, 1995
- Deviations:
- yes
- Remarks:
- due to the properties of the test item (e.g. rapid hydrolysis in contact with water), this standard test guideline was not generally applicable and substantial modifications were necessary.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Version / remarks:
- Council Regulation (EC) No 440/2008
- Deviations:
- yes
- Remarks:
- due to the properties of the test item (e.g. rapid hydrolysis in contact with water), this standard test guideline was not generally applicable and substantial modifications were necessary.
- 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:
- due to the properties of the test item (e.g. rapid hydrolysis in contact with water), this standard test guideline was not generally applicable and substantial modifications were necessary.
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline for the testing of chemicals, 111 "Hydrolysis as a Function of pH"
- Version / remarks:
- dated April 13, 2004
- Deviations:
- yes
- Remarks:
- due to the properties of the test item (e.g. rapid hydrolysis in contact with water), this standard test guideline was not generally applicable and substantial modifications were necessary.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Water solubility:
- >= 20 - <= 42.1 µg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- tungsten
- Incubation duration:
- 30 min
- Temp.:
- 25 °C
- pH:
- >= 2 - <= 3
- Remarks on result:
- other: Loading of aqueous phase: refer to "any other information on results incl. tables"; Temperature range: 20-25 °C.
- Water solubility:
- >= 38.6 - <= 39.1 µg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- tungsten
- Incubation duration:
- 30 min
- Temp.:
- 25 °C
- pH:
- 4
- Remarks on result:
- other: Loading of aqueous phase: refer to "any other information on results incl. tables"; Temperature range: 20-25 °C.
- Water solubility:
- >= 44.7 - <= 44.9 µg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- tungsten
- Incubation duration:
- 30 min
- Temp.:
- 25 °C
- pH:
- 7
- Remarks on result:
- other: Loading of aqueous phase: refer to "any other information on results incl. tables"; Temperature range: 20-25 °C.
- Water solubility:
- >= 44.6 - <= 46.1 µg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- tungsten
- Incubation duration:
- 30 min
- Temp.:
- 25 °C
- pH:
- 9
- Remarks on result:
- other: Loading of aqueous phase: refer to "any other information on results incl. tables"; Temperature range: 20-25 °C.
- Conclusions:
- The determined concentrations of tungsten in the sample solution after preparation of the test item in water varied between 20.0–42.1 µg/L, corresponding to a mean recovery of 5.4 % ± 1.4 %.
The determined concentrations of tungsten in the sample solution after preparation of the test item in water and pH adjustment to pH 4, pH 7 resp. pH 9 were between 38.6–39.1 µg/L, 44.7–44.9 µg/L resp. 44.6–46.1 µg/L, corresponding to mean recoveries of 6.4 % ± 0.05 %, 7.4 % ± 0.02 % resp. 7.5 % ± 0.12 %. - Executive summary:
The determined concentrations of tungsten in the sample solution after preparation of the test item in water varied between 20.0–42.1 µg/L, corresponding to a mean recovery of 5.4 % ± 1.4 %.
The determined concentrations of tungsten in the sample solution after preparation of the test item in water and pH adjustment to pH 4, pH 7 resp. pH 9 were between 38.6–39.1 µg/L, 44.7–44.9 µg/L resp. 44.6–46.1 µg/L, corresponding to mean recoveries of 6.4 % ± 0.05 %, 7.4 % ± 0.02 % resp. 7.5 % ± 0.12 %.
It can be summarised, that referring to the results of the pre-tests, tungsten hexachloride showed a rapid hydrolysis in contact with aqueous solutions. A temperature rise during the addition of aqueous solutions was observed due to the exothermic reaction. The dispersion of the WCl6 test item with water was acidic (pH-value 2–3) and within the study, after approx. 30 minutes agitation whilst cooling, an insoluble residue occured in water.
Reference
Test Item in Water
The following table represents the results obtained from each analysis of the fivefold preparation of the test item in water:
preparation |
sample mass [mg] |
nominal concentration of tungsten in sample solution [µg/L] |
actual concentration of tungsten in sample solution [µg/L] |
recovery of tungsten in sample solution [%] |
1 |
654 |
607 |
40.6 |
6.7 |
2 |
558 |
517 |
20.0 |
3.9 |
3 |
660 |
611 |
42.1 |
6.9 |
4 |
608 |
564 |
30.4 |
5.4 |
5 |
603 |
559 |
24.1 |
4.3 |
|
mean |
5.4 |
||
SD |
1.4 |
|||
RSD [%] |
25.0 |
Test Item in Water after pH Adjustment
The following table represents the results obtained from each analysis of the threefold preparation of the test item in water adjusted to pH 4, pH 7, and pH 9:
preparation |
pH value |
sample mass [mg] |
nominal concentration of tungsten in sample solution [µg/L] |
actual concentration of tungsten in sample solution [µg/L] |
recovery of tungsten in sample solution [%] |
1 |
4 |
654 |
607 |
38.6 |
6.4 |
2 |
4 |
654 |
607 |
39.1 |
6.4 |
3 |
4 |
654 |
607 |
39.1 |
6.4 |
|
|
|
|
mean |
6.4 |
|
|
|
|
SD |
0.05 |
|
|
|
|
RSD [%] |
0.8 |
|
|||||
1 |
7 |
654 |
607 |
44.9 |
7.4 |
2 |
7 |
654 |
607 |
44.7 |
7.4 |
3 |
7 |
654 |
607 |
44.8 |
7.4 |
|
|
|
|
mean |
7.4 |
|
|
|
|
SD |
0.02 |
|
|
|
|
RSD [%] |
0.3 |
|
|||||
1 |
9 |
654 |
607 |
46.1 |
7.6 |
2 |
9 |
654 |
607 |
44.6 |
7.3 |
3 |
9 |
654 |
607 |
45.4 |
7.5 |
|
|
|
|
mean |
7.5 |
|
|
|
|
SD |
0.12 |
|
|
|
|
RSD [%] |
1.6 |
Description of key information
The determined concentrations of tungsten in the sample solution after preparation of the test item in water varied between 20.0 - 42.1 µg/L, corresponding to a mean recovery of 5.4 % ± 1.4 %.
The determined concentrations of tungsten in the sample solution after preparation of the test item in water and pH adjustment to pH 4, pH 7 resp. pH 9 were between 38.6 - 39.1 µg/L, 44.7 - 44.9 µg/L resp. 44.6 - 46.1 µg/L, corresponding to mean recoveries of 6.4 % ± 0.05 %, 7.4 % ± 0.02 % resp. 7.5 % ± 0.12 %.
It can be summarised, that referring to the results of the pre-tests, tungsten hexachloride showed a rapid hydrolysis in contact with aqueous solutions. A temperature rise during the addition of aqueous solutions was observed due to the exothermic reaction. The dispersion of the WCl6 test item with water was acidic (pH-value 2 - 3) and within the study, after approx. 30 minutes agitation whilst cooling, an insoluble residue occured in water.
Key value for chemical safety assessment
- Water solubility:
- 46.1 µg/L
- at the temperature of:
- 25 °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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