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Wolframcarbid
ncic61198 · Wolframcarbid · Nitinol Sheets · tungsten cabide · Tungsten carbid · Wolfram carbide · Tunsten carbide · TUNGSTEN CARBIDE
Identifikatoren & physikalische Daten
| CAS No. | 12070-12-1 |
|---|---|
| Summenformel | CW- |
| Durchschnittliche Molmasse | 195,85 g/mol |
| Monoisotopische Masse | 195,950933 g/mol |
| SMILES | [C-]#[W] |
| InChIKey | UONOETXJSWQNOL-UHFFFAOYSA-N |
| PubChem CID | 25504 |
| Lokaler Name | Wolframcarbid |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 0 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 1 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 2 |
| Formalladung | -1 |
| Komplexität | 10 |
| Stoffklassen | Metals -> Metals, Inorganic Compounds |
| Dichte | 15.6 at 64 °F15,63 g/cm3 |
| Siedepunkt | 10832 °F6000°C |
| Schmelzpunkt | 4946-5126 °F2870°C |
| Dampfdruck | 4 mmHg |
| Physical Description | Dry PowderCBIA 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. |
| Löslichkeit | insoluble in H2Osoluble in HNO3/HFSoluble in nitric acid and hydrofluroic acid. Insoluble in water. |
| Aggregatzustand | powder |
| Farbe | Gray |
| Wichte | 15.63 |
| Merck | 14,9815 |
| InChI | InChI=1S/C.W/q-1+1 |
| InChIKey | UONOETXJSWQNOL-UHFFFAOYSA-N |
| SMILES | [W+]#[C-] |
| Hardness, Rockwell A | 90 |
| Modulus of Elasticity | 669 - 696 GPa |
| Vickers Microhardness | 1300, in the (1010) plane2200, in the (0001) plane |
| EPA chemische Informationen | Tungsten monocarbide (12070-12-1) |
Sicherheit & Vorschriften
| Regulatorische Informationen | Chemical: Tungsten carbide (WC)Hazard Traits - CarcinogenicityTungsten 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. |
|---|---|
| Weitere Sicherheitsinformationen | IMAP assessments - Tungsten carbide (WC): Human health tier I assessment |
| Gefahrenübersicht | 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 carbideIt is thought that inhaled cemented tungsten carbide injures the lung by releasing toxic oxygen speciesAlso may occur after exposure to cobalt metal powder mixed with iron and diamond dust in diamond polishersThere 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. |
| Expositionsschutz und Persönliche Schutzausrüstung | Biological Exposure Indices (BEI) [ACGIH] - Cobalt in urine = nonquantitativesample at end of shift at end of workweek |
| Threshold Limit Values (TLV) | 0.005 [mg/m3], as Co, thoracic particulate matter0.005 mg/m³ (thoracic particulate matter) [2015] |
| Permissible Exposure Limit (PEL) | 0.1 mg Co/m³ |
| Recommended Exposure Limit (REL) | 0.05 mg Co/m³ |
Anwendungen & Verwendung
Verwenden
Tungsten carbide is extremely hard and are excellent cutting materials. It is used extensivly in the tool and die industry for drilling and cutting tools, sand blasting nozzels, armor-piercing bullets, and studs to increase traction of tires. Besides, it is used in dental burs, surgical instruments, wear-resistant coatings; in manufacture of cemented carbide; Substitute for noble metals in catalysis.