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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
Endpoint summary
Administrative data
Description of key information
- 10th percentile: 44 L/kg
- Median: 174 L/kg
- 90th percentile: 692 L/kg
- 10th percentile: 28,395 L/kg
- Median: 140,000 L/kg
- 90th percentile: 700,000 L/kg
Hydrolysis of tungsten hexachloride was assessed in a combined study on water solubility and hydrolysis (Golz, 2017). In summary tungsten hexachloride shows a rapid hydrolysis in contact with aqueous solutions. This exothermic reaction results in a temperature rise of the test solutions. Tungsten hexachloride was almost completely dissolved in the three buffer solutions at pH 4, 7 and 9. The determined concentrations of tungsten in the sample solution after preparation of the test item in citrate buffer (pH 4) ranged from 41.7 µg/L to 66.5 µg/L, corresponding to a mean recovery of 96.9 ± 8.1 %. The determined concentrations of tungsten in the sample solution after preparation of the test item in phosphate buffer (pH 7) varied between 43.3 to 59.4 µg/L, corresponding to a mean recovery of 88.9 ± 6.1 %. The determined concentrations of tungsten in the sample solution after preparation of the test item in borate buffer (pH 9) ranged between 48.9 to 58.7 µg/L, corresponding to a mean recovery of 94.3 ± 1.1 %.
The endpoint biodegradation is not applicable to tungsten hexachloride as inorganic substance.
Bioaccumulation/bioconcentration of tungsten metal and inorganic tungsten compounds is not expected to occur in aquatic or soil/sediment species. Calculated BCF values for sodium tungstate in the fish species Poecilia reticulata are 0.29 ± 0.94 L/kg and 1.57 ± 0.5 L/kg wet and dry weight, respectively. The BCF values for sodium metatungstate in Poecilia reticulata were 0.51 ± 0.24 L/kg and 2.74 ± 1.32 L/kg wet weight and dry weight (Strigul et al., 2010).
Relatively low bioaccumulation of tungsten is observed in sunflower leaves at soil concentrations of 3,900 mg W/kg soil, with calculated concentration factors plateauing at approximately 0.05 (Johnson et al., 2009). Tungsten concentrations factors calculated for ryegrass were higher and ranged from 56.1-0.202 (Strigul et al., 2005). However, it should be noted that, in this study, background levels of tungsten in the collected soils used for testing were not determined prior to testing.
Data from Strigul et al. (2005) and Inouye et al. (2006) indicate concentration factors for earthworms ranging from 1.45 – 0.008, respectively, with only the lowest tungsten concentration resulting in a BCF of > 1.
Therefore, tungsten compounds are not expected to bioaccumulate in aquatic and terrestrial organisms.
The adsorption in soil and sediment was evaluated in two studies with tungsten metal and two studies sodium tungstate dihydrate. Based on reported Kd values for tungsten compounds in soil and sediment, their mobility in respective compartments is expected to be low.
The following partitioning coefficients were statistically derived based on studies using appropriate methodology:
Kd soils (Griggs et al., 2009 and Bednar et al., 2008):
Kd sediment (Salminen (ed.) et al., 2005):
Information from inorganic tungsten compounds other than tungsten hexachloride is used in a read-across approach in the assessment of the target substance tungsten hexachloride. For details and justification of read-across please refer to the attached report in section 13 of IUCLID.
Additional information
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