Basic information
- CAS
12070-12-1- Standard SMILES
[C-]#[W]- InChIKey
UONOETXJSWQNOL-UHFFFAOYSA-N- Molecular formula
- CW-
- Average molar mass
- 195.85 g/mol
- Monoisotopic mass
- 195.950933
Names & identifiers
- Preferred name
- tungsten carbide (WC)
- IUPAC
- methanidylidynetungsten
- English name
- Tungsten carbide
- Molecular formula
- CW
- Molecular weight
- 195.85
Names & synonyms
Tungsten monocarbideTungsten carbide (WC)RefChem:192520DTXSID402930512070-12-1methanidylidynetungsten11130-73-7Tungsten carbide, (WC)CCRIS 9211NCI C61198EINECS 235-123-0SCHEMBL29375364
Show more names
ncic61198WolframcarbidNitinol Sheetstungsten cabideTungsten carbidWolfram carbideTunsten carbideTUNGSTEN CARBIDEtungstencarbide(wc)tungsteniomethanide
OAXLZNWUNMCZSO-UHFFFAOYSA-NTungsten, containing > 2% cobaltTungsten, containing > 3% nickelTungsten, containing > 2% cobalt [Tungsten and cemented tungsten carbide]Tungsten, containing > 3% nickel [Tungsten and cemented tungsten carbide]EC 235-123-0
Database identifiers
- CAS
12070-12-1- PubChem CID
- 25504
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 1
- Rotatable bonds
- 0
- Heavy atoms
- 2
- Formal charge
- -1
- Complexity
- 10
Experimental & physicochemical properties
Chemical ClassesMetals -> Metals, Inorganic Compounds
Density15.6 at 64 °F
Boiling Point10832 °F
Melting Point4946-5126 °F
Vapor Pressure4 mmHg
Physical Description
Dry Powder; CBI
A mixture of tungsten carbide, cobalt, and sometimes other metals & metal oxides or carbides; [NIOSH]
A mixture of tungsten carbide, cobalt, and sometimes other metals & metal oxides or carbides.
Physicochemical properties
- Melting point
- 2870 °C · 2870°C
- Boiling point
- 6000 °C · 6000°C
- Density
- 15 · 15,63 g/cm3
- solubility
- 2 O; · insoluble in H2O; soluble in HNO3/HF
- form
- powder
- color
- Gray
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
Hazard information
Regulatory Information
Chemical: Tungsten carbide (WC)
Hazard Traits - Carcinogenicity
Tungsten carbide (WC) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Tungsten carbide (WC) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
Tungsten carbide (WC): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Other Safety InformationIMAP assessments - Tungsten carbide (WC): Human health tier I assessment
Hazards Summary
The tungsten carbide (WC) content is generally 85-95% and the cobalt content is generally 5-15%. [NIOSH] Hard metal lung disease is caused by the composite material, a mixture of cobalt and tungsten carbide; It is thought that inhaled cemented tungsten carbide injures the lung by releasing toxic oxygen species; Also may occur after exposure to cobalt metal powder mixed with iron and diamond dust in diamond polishers; There is no evidence that cobalt metal alone or other cobalt compounds can cause hard metal disease; [Nordberg, p. 753] Sprince and colleagues (1984) reported that interstitial and obstructive lung disease was found in 11 of 290 subjects who worked at two tungsten carbide production plants.' [ACGIH] Skin sensitization to cobalt can occur in the hard metal industries. [Marks, p. 79] See Tungsten. See Cobalt. This TLV is listed by ACGIH under Hard metals containing Cobalt and Tungsten carbide.
Safety & protection
Exposure Control and Personal ProtectionBiological Exposure Indices (BEI) [ACGIH] - Cobalt in urine = nonquantitative; sample at end of shift at end of workweek;
Chemistry & industry
Uses & manufacturing
Uses
Used to manufacture hard metal tools; [LaDou, p. 377] Occupational asthma reported in a metal grinder; [Malo] Used in construction, metalworking, mining, and oil/gas drilling industries; Workers exposed during tool grinding and saw blade sharpening/retipping; Exposure may occur during detonation gun welding; [ACGIH]
Metal Machining [Category: Heat or Machine]
U.S. Production2023: 10,000,000 - <25,000,000 lb
Consumer UsesAlloys
Industry UsesIntermediate
General Manufacturing Information
Machinery Manufacturing
Tungsten carbide (WC): ACTIVE
Applications
UsesIndustry Application Role/benefit Mining Making mining tips, drill bits, and other cutting and mining tools Raw material/extreme hardness and resistance to wear and tear Cutting and milling Manufacture of mill products and cutting tools for machining Raw material/extreme hardness, resistance to high temperature and good formability Jewelry Crafting rings, pendants, earrings and other jewelry Raw material/extreme hardness and high resistance to scratching Medicine Manufacture of surgical instruments Raw material/extreme hardness and high resistance to pitting and rusting Ammunition Armor-piercing ammunition Raw material/combination of great hardness and very high density Nuclear Neutron reflector Reflector material Sports Tips of ski pole Raw material/increase resistance to wear and service life Drive tracks of snowmobiles and motorcycle and bicycle tires Farriery and shoes sole Catalyst Production of water from hydrogen and oxygen at room temperature Replacement of platinum Reduction of tungsten trioxide by hydrogen in the presence of water Isomerization of 2,2-dimethylpropane to 2-methylbutane Hydrazine-powered satellite thrusters Replaceme
UsesTungsten Carbide/Carbon (WC/C) is a black-gray colored coating of hard tungsten carbide particles in a soft amorphous carbon matrix. It is used for precision components with abrasive and adhesive wear, seizure problems (poor lubrication) and for dry machining applications.
Related reactions
4 records
Compound notes
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