Registration Dossier
Registration Dossier
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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
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EC number: 231-975-2 | CAS number: 7783-03-1
- 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
Uses at industrial sites
Documentsopen allclose all
Uses at industrial sites
Contributing activity / technique for the environment
- Environmental release category (ERC):
- ERC6b: Use of reactive processing aid at industrial site (no inclusion into or onto article)
Contributing activity / technique for workers
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- PROC 4: Chemical production where opportunity for exposure arises
- PROC 8a: Transfer of substance or mixture (charging and discharging) at non-dedicated facilities
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- Subsequent service life relevant for this use:
- no
Uses at industrial sites
Contributing activity / technique for the environment
- Environmental release category (ERC):
- ERC6a: Use of intermediate
Contributing activity / technique for workers
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- PROC 26: Handling of solid inorganic substances at ambient temperature
- Subsequent service life relevant for this use:
- no
Uses at industrial sites
Contributing activity / technique for the environment
- Name of activity / technique:
- Use of dihydrogen wolframate to produce catalysts
- Environmental release category (ERC):
- ERC6a: Use of intermediate
Contributing activity / technique for workersopen allclose all
- Process category (PROC):
- PROC 1: Chemical production or refinery in closed process without likelihood of exposure or processes with equivalent containment conditions
- Process category (PROC):
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Process category (PROC):
- PROC 9: Transfer of substance or mixture into small containers (dedicated filling line, including weighing)
- Process category (PROC):
- PROC 14: Tabletting, compression, extrusion, pelletisation, granulation
- Product category used:
- PC 19: Intermediate
- Sector of end use:
- SU 8: Manufacture of bulk, large scale chemicals (including petroleum products)
- Substance supplied to that use in form of:
- as such
- Subsequent service life relevant for this use:
- no
- Related assessment:
- use assessed in a joint CSR
Uses at industrial sites
Contributing activity / technique for the environment
- Name of activity / technique:
- Use of dihydrogen wolframate in the production of catalysts containing tungsten trioxide
- Environmental release category (ERC):
- ERC6b: Use of reactive processing aid at industrial site (no inclusion into or onto article)
Contributing activity / technique for workersopen allclose all
- Name of activity / technique:
- Step 1: Raw material handling
- Process category (PROC):
- PROC 8a: Transfer of substance or mixture (charging and discharging) at non-dedicated facilities
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 2: Loading the batch furnace
- Process category (PROC):
- PROC 4: Chemical production where opportunity for exposure arises
- Name of activity / technique:
- Step 3: Calcination
- Process category (PROC):
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- Name of activity / technique:
- Step 4: Unloading the furnace and transfer to homogenisation operation
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 5: Homogenisation
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 6: Unloading homogenisation unit and fill into metal containers
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 7: Maintenance and cleaning
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Product category used:
- PC 7: Base metals and alloys
- Sector of end use:
- SU 8: Manufacture of bulk, large scale chemicals (including petroleum products)
- SU 9: Manufacture of fine chemicals
- SU 14: Manufacture of basic metals, including alloys
- SU 15: Manufacture of fabricated metal products, except machinery and equipment
- Substance supplied to that use in form of:
- as such
- Subsequent service life relevant for this use:
- no
- Related assessment:
- use assessed in a joint CSR
Uses at industrial sites
Contributing activity / technique for the environment
- Name of activity / technique:
- Use of tungstic acid based catalysts
- Environmental release category (ERC):
- ERC6b: Use of reactive processing aid at industrial site (no inclusion into or onto article)
Contributing activity / technique for workersopen allclose all
- Name of activity / technique:
- Step 1: Catalyst delivery and handling - The substance is delivered and stored as a solution
- Process category (PROC):
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 2: Transfer of liquid raw material into production equipment - The liquid substance is pumped into production equipment
- Process category (PROC):
- PROC 4: Chemical production where opportunity for exposure arises
- Name of activity / technique:
- Step 3: Precipitation, Impregnation, Filtration, Drying and Mixing - The substance is used to prepare a supported catalyst system using classical catalyst preparation methods of precipitation and/or impregnation to disperse the substance on wet or dry carrier material. This is followed by filtration, drying, and mixing of the supported catalyst material
- Process category (PROC):
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 4: Forming - Formation of shaped catalysts, for example, by extrusion
- Process category (PROC):
- PROC 14: Tabletting, compression, extrusion, pelletisation, granulation
- Name of activity / technique:
- Step 5: Calcination - The catalyst material is thermally treated by calcination at temperatures between 200 to 600°C in a closed system. During this process, the tungstic acid is converted to tungsten trioxide
- Process category (PROC):
- PROC 1: Chemical production or refinery in closed process without likelihood of exposure or processes with equivalent containment conditions
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 6: Maintenance and cleaning - Various maintenance and cleaning operations inside and outside the equipment
- Process category (PROC):
- PROC28: Manual maintenance (cleaning and repair) of machinery
- Product category used:
- PC 20: Products such as ph-regulators, flocculants, precipitants, neutralisation agents
- PC 0: Other: UCN P15500: catalyst
- Sector of end use:
- SU 8: Manufacture of bulk, large scale chemicals (including petroleum products)
- SU 9: Manufacture of fine chemicals
- Substance supplied to that use in form of:
- in a mixture
- Subsequent service life relevant for this use:
- no
- Related assessment:
- use assessed in a joint CSR
Uses at industrial sites
Contributing activity / technique for the environment
- Environmental release category (ERC):
- ERC6a: Use of intermediate
Contributing activity / technique for workers
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- PROC 4: Chemical production where opportunity for exposure arises
- PROC 8a: Transfer of substance or mixture (charging and discharging) at non-dedicated facilities
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- Subsequent service life relevant for this use:
- no
Uses at industrial sites
Contributing activity / technique for the environment
- Environmental release category (ERC):
- ERC4: Use of non-reactive processing aid at industrial site (no inclusion into or onto article)
- ERC6a: Use of intermediate
- ERC6b: Use of reactive processing aid at industrial site (no inclusion into or onto article)
Contributing activity / technique for workers
- Process category (PROC):
- PROC 1: Chemical production or refinery in closed process without likelihood of exposure or processes with equivalent containment conditions
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- PROC 4: Chemical production where opportunity for exposure arises
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- PROC 9: Transfer of substance or mixture into small containers (dedicated filling line, including weighing)
- PROC 14: Tabletting, compression, extrusion, pelletisation, granulation
- Subsequent service life relevant for this use:
- no
Uses at industrial sites
Contributing activity / technique for the environment
- Name of activity / technique:
- Use of tungstic acid to manufacture tungsten trioxide powder
- Environmental release category (ERC):
- ERC6a: Use of intermediate
Contributing activity / technique for workersopen allclose all
- Name of activity / technique:
- Step 1 - Raw material handling: Tungsyic acid powder is received and stored in sealed containers. The raw material is transferred through an automated loading system to the next step
- Process category (PROC):
- PROC 8a: Transfer of substance or mixture (charging and discharging) at non-dedicated facilities
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 2 - Loading the batch furnace: Tungstic acid is loaded manually into calcinations boats, which are transferred into the batch furnace
- Process category (PROC):
- PROC 4: Chemical production where opportunity for exposure arises
- Name of activity / technique:
- Step 3 - Calcination: Tungsten trioxide is produced by calcination of tungstic acid under oxidising conditions in a furnace. The furnace operates at approximately 700 °C
- Process category (PROC):
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- Name of activity / technique:
- Step 4 - Unloading the furnace and transfer to homogenisation operation: After calcination, the powder is unloaded from the furnace. The powder is collected in sealed metal containers
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 5 - Homogenisation: After calcination, the powder is blended in a tumbling mixer or a double cone blender to homogenise the tungsten trioxide. The homogenisation operation occurs in a closed system
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 6 - Unloading homogenisation unit and fill into metal containers: Emptying the homogenisation unit and filling powder into sealed metal containers
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 7 - Maintenance and cleaning: Various maintenance and cleaning operations inside and outside the equipment
- Process category (PROC):
- PROC28: Manual maintenance (cleaning and repair) of machinery
- Product category used:
- PC 7: Base metals and alloys
- Sector of end use:
- SU 14: Manufacture of basic metals, including alloys
- SU 15: Manufacture of fabricated metal products, except machinery and equipment
- Substance supplied to that use in form of:
- as such
- Subsequent service life relevant for this use:
- no
- Related assessment:
- use assessed in a joint CSR
Uses at industrial sites
Contributing activity / technique for the environment
- Name of activity / technique:
- Use of tungstic acid to manufacture ultrafine tungsten and tungsten carbide powders
- Environmental release category (ERC):
- ERC6a: Use of intermediate
Contributing activity / technique for workersopen allclose all
- Name of activity / technique:
- Step 1 - Transfer from drums to process metal containers: The tungstic acid powder is transferred from drums to process metal containers
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 2 - Furnace charging: The tungstic acid powder is filled manually or automatically into reduction boats for pusher furnaces or it is filled directly to a rotary furnace
- Process category (PROC):
- PROC 26: Handling of solid inorganic substances at ambient temperature
- Name of activity / technique:
- Step 3 - Reduction process: The tungsic acid powder is reduced to W metal powder in hydrogen atmosphere at approximately 1000°C either in pusher furnaces or rotary furnaces
- Process category (PROC):
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- Name of activity / technique:
- Step 4 - Sieving: The tungsten metal powder is sieved immediately after reduction and filled into closed containers
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 5 - Transfer to mixer: The tungsten metal powder is transferred from the transport containers into a mixer
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 6: - Homogenising: The tungsten metal powder is homogenised in a mixer
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 7 - Filling: The homogenised (and optional doped) tungsten metal powder is filled into closed containers
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 8: Transfer to mixer (ONLY for WC manufacture): tungsten metal powder is transferred from the transport containers into a mixer. Carbon black is filled into the mixer
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step 9:- Blending (ONLY for WC manufacture): Mixing of tungsten metal powder with carbon black in a closed system
- Process category (PROC):
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 10: Transfer to furnace (ONLY for WC manufacture): The powder blend is unloaded from the mixer and transferred to the furnace hopper. Alternatively, it is unloaded into special containers for batch carburisation. The W and C powder blend is fed into the furnace or furnace boats. Alternatively, the special containers are loaded into the batch furnace
- Process category (PROC):
- PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
- Name of activity / technique:
- Step11 - Carburisation or furnace operation (ONLY for WC manufacture): The W and C powder blend is carburized to WC at elevated temperature in the furnace in a protective atmosphere (eg, H2 or N2)
- Process category (PROC):
- PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
- Name of activity / technique:
- Step 12 - Maintenance: Maintenance of production and ventilation equipment
- Process category (PROC):
- PROC28: Manual maintenance (cleaning and repair) of machinery
- Product category used:
- PC 7: Base metals and alloys
- Sector of end use:
- SU 9: Manufacture of fine chemicals
- SU 14: Manufacture of basic metals, including alloys
- SU 15: Manufacture of fabricated metal products, except machinery and equipment
- Substance supplied to that use in form of:
- as such
- Subsequent service life relevant for this use:
- no
- Related assessment:
- use assessed in a joint CSR
Uses at industrial sites
Contributing activity / technique for the environment
- Name of activity / technique:
- Use of tungstic acid based catalysts
- Environmental release category (ERC):
- ERC4: Use of non-reactive processing aid at industrial site (no inclusion into or onto article)
- ERC6a: Use of intermediate
- ERC6b: Use of reactive processing aid at industrial site (no inclusion into or onto article)
Contributing activity / technique for workersopen allclose all
- Name of activity / technique:
- Step 1: Catalyst delivery and handling - The substance is delivered and stored as a solution
- Process category (PROC):
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 2: Transfer of liquid raw material into production equipment - The liquid substance is pumped into production equipment
- Process category (PROC):
- PROC 4: Chemical production where opportunity for exposure arises
- Name of activity / technique:
- Step 3: Precipitation, Impregnation, Filtration, Drying and Mixing - The substance is used to prepare a supported catalyst system using classical catalyst preparation methods of precipitation and/or impregnation to disperse the substance on wet or dry carrier material. This is followed by filtration, drying, and mixing of the supported catalyst material
- Process category (PROC):
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 4: Forming - Formation of shaped catalysts, for example, by extrusion
- Process category (PROC):
- PROC 14: Tabletting, compression, extrusion, pelletisation, granulation
- Name of activity / technique:
- Step 5: Calcination - The catalyst material is thermally treated by calcination at temperatures between 200 to 600°C in a closed system. During this process, the tungstic acid is converted to tungsten trioxide
- Process category (PROC):
- PROC 1: Chemical production or refinery in closed process without likelihood of exposure or processes with equivalent containment conditions
- PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
- Name of activity / technique:
- Step 6: Maintenance and cleaning - Various maintenance and cleaning operations inside and outside the equipment
- Process category (PROC):
- PROC28: Manual maintenance (cleaning and repair) of machinery
- Product category used:
- PC 20: Products such as ph-regulators, flocculants, precipitants, neutralisation agents
- PC 0: Other: UCN P15500: catalyst
- Sector of end use:
- SU 8: Manufacture of bulk, large scale chemicals (including petroleum products)
- SU 9: Manufacture of fine chemicals
- Substance supplied to that use in form of:
- in a mixture
- Subsequent service life relevant for this use:
- no
- Related assessment:
- use assessed in a joint CSR
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.