Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 234-364-9 | CAS number: 11120-25-5
- 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
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.574 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.705 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.034 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 70 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1 630 mg/kg sediment dw
- Assessment factor:
- 10
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 163 mg/kg sediment dw
- Assessment factor:
- 10
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 2.17 mg/kg soil dw
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
All PNECs derived are in concentration of tungsten ion, as toxicity is expected to occur from the metal ion.
Conclusion on classification
Aquatic toxicity classification of inorganic metals and metal compounds is conducted by comparing transformation/dissolution (T/D) data for the substance, generated using the standard protocol (UN GHS, Annex 10) [see Table 4 in Section 1.3 for results] with toxicity data for the soluble metal substance as described in the CLP technical guidance (section IV. 5 Application of classification criteria to metals and metal compounds) (EU, 2008). The T/D data is ideally tested at the pH at which the highest dissolution is expected, within the range defined by the test protocol (pH 5.5-8.5). Since inorganic tungsten substances have been demonstrated to have a higher T/D rate at pH 8.5 than pH 6, the data used for aquatic toxicity classification of ammonium paratungstate was derived at pH 8.5 (24-hour T/D testing) and found to be equal to 67200 μg tungsten/L (67.2 mg tungsten/L)(CANMET-MMSL, 2010). This T/D value was compared to the aquatic toxicity reference value derived as the lowest acute effect level from studies using sodium tungstate. In the context of the classification scheme for metals and metal compounds, the toxicity value of the metal ion (tungsten) is derived from the sodium tungstate toxicity testing of algae (ErC50). This is the value used for toxicity classifications of all inorganic tungsten substances since the tungsten is readily soluble from sodium tungstate and the toxicity is not affected by the sodium anion. Since the toxicity of tungsten in ammonium paratungstate is potentially affected by the ammonium anion (see section 7.1.2 for more details), it is not appropriate to use the ammonium paratungstate toxicity value to evaluate the tungsten metal ion toxicity. The reference value was thus determined to be 31.0 mg tungsten/L based on the acute acceptable toxicity of sodium tungstate to algae (see section 7.1.2 for more details). Since the dissolution of ammonium paratungstate (67.2 mg tungsten/L) is greater than the reference toxicity value (31.0 mg tungsten/L, based on the ErC50 from the algal inhibition test with sodium tungstate), the reference toxicity value based on tungsten ion concentration is then corrected for the molecular weight of ammonium paratungstate to determine its classification. This calculation is conducted as follows:
31.0 mg tungsten/L = 0.0310 g W/L
0.0310 g W/L x (1 mol W/183.84 g) x (1 mol APT/12 mol W) x (3132.2 g APT/1 mol APT) = 0.0440 g APT/L
0.0440 g APT/L = 44.0 mg APT/L
This toxicity value is used for classification by comparing to the aquatic toxicity cut-off values for classification. Since 44 mg APT/L is >10 mg/L and ≤100 mg/L, ammonium wolframate classifies as Acute Category 3 for aquatic toxicity according to the CLP. However, since the lowest no effect chronic value 4.80 mg ammonium wolframate/L (3.38 mg tungsten/L, based on the chronic reference value determined for sodium tungstate (ErC10) and corrected for molecular weight of ammonium paratungstate) is greater than 1 mg/L, ammonium paratungstate does not receive an acute or chronic classification.
The CLP classification scheme for evaluating aquatic toxicity of metals and metal compounds is the same as that used to classify metals and metal compounds under the Dangerous Substances Directive, with the exception of the name of the classifications (eg DSD cites R phrases, CLP uses acute and chronic categories). Although the DSD does not specifically cite the classification scheme for metals and metal compounds, the scheme was outlined in the ECB documents used in the classification of nickel metal (massive and powder). In addition, this classification scheme was used to evaluate aquatic toxicity of nickel metal and some copper compounds (ECB, 2001; ECB, 2005).
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.