Silicon carbide sample.
| IUPAC name
| Other names
|Molar mass||40.10 g/mol|
|Appearance||Black lustrous solid|
|Melting point||2,730 [convert: invalid number]|
|Boiling point||[convert: invalid number]|
|Safety data sheet||ScienceLab|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Silicon carbide, also known as carborundum is a compound of silicon and carbon with chemical formula SiC, mainly used as an abrasive. Silicon carbide occurs naturally as the rare mineral moissanite.
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Because of the rarity of natural moissanite, most silicon carbide is synthetic. It is used as an abrasive, and more recently as a semiconductor and diamond simulant of gem quality. The simplest manufacturing process is to combine silica sand and carbon in an Acheson graphite electric resistance furnace at a high temperature, between 1,600 °C (2,910 °F) and 2,500 °C (4,530 °F). Fine SiO2 particles in plant material (e.g. rice husks) can be converted to SiC by heating in the excess carbon from the organic material. The silica fume, which is a byproduct of producing silicon metal and ferrosilicon alloys, also can be converted to SiC by heating with graphite at 1,500 °C (2,730 °F).
Silicon carbide is non-flammable and non-explosive.
Effects of Exposure: To the best of our knowledge the chemical, physical and toxicological properties of silicon carbide have not been thoroughly investigated and reported. Silicon carbide is a nuisance dust capable of producing nonprogressive pulmonary fibrosis. Silicon carbide implants have caused tumors in laboratory animals.
Acute Effects: Inhalation: May cause irritation. Ingestion: No acute health effects recorded. Skin: May cause abrasive irritation. Eye: May cause abrasive irritation.
Chronic Effects: Inhalation: May cause pneumoconiosis. No other chronic health effects recorded.
Target Organs: No target organs recorded. Medical Conditions Generally Aggravated by
Exposure: Pre-existing respiratory disorders.
Carcinogenicity: NTP: No IARC: No OSHA: No