Silicon carbide
Also known as Carborundum, Silicon monocarbide, Crystar
Key facts
What buyers check first
- Appearance
- Exceedingly hard, green to bluish-black, iridescent, sharp crystals
- Melting point
- 2,600 °C
- Boiling point
- Sublimes
- Density
- 3.2 g/cm³
- Solubility
- INSOL IN COLD WATER, HOT WATER, & ACID, SOL IN FUSED POTASSIUM HYDROXIDE
- HS code
- 284920
- Category
- Silicates, borates and other salts
What is Silicon carbide?
Plain description, key identifiers and synonyms
Silicon carbide is an organosilicon compound.
Identifiers
Registry numbers, names and line notations, tap to copy
- IUPAC name
- methanidylidynesilanylium
- CAS number
- 409-21-2 CAS number cross-checked
- EC number
- 206-991-8
- Molecular formula
- CSi
- UNII
- WXQ6E537EW
- MDL number
- MFCD00049531
- INCI name
- SILICON CARBIDE
- InChIKey
- HBMJWWWQQXIZIP-UHFFFAOYSA-N
- InChI
- InChI=1S/CSi/c1-2
- SMILES (canonical and isomeric)
- [C-]#[Si+]
Synonyms
- Carborundum
- Silicon monocarbide
- Crystar
- Betarundum
- Carborundeum
- Tokawhisker
- Carbolon
- Nicalon
- Silundum
- Silicon carbide (SiC)
- Carbon silicide
- Green densic
- Carbofrax M
- Betarundum UF
- Annanox CK
- Betarundum ST-S
- Crystolon 37
- Crystolon 39
- Betarundum ultrafine
- Hitaceram SC 101
- SC 9 (Carbide)
- Densic C 500
- Green densic GC 800
- KZ 3M
- KZ 5M
Show all 39 synonymsShow fewer synonyms
- KZ 7M
- SCW 1
- DU-A 3C
- DU-A 1
- DU-A 2
- DU-A 3
- DU-A 4
- SD-GP 6000
- SD-GP 8000
- UF 15
- SC 201
- YE 5626
- GC 10000
- carbonite
Physical and chemical properties
Measured values and descriptors computed from the structure
Physical and chemical properties
Measured values, check the supplier specification for your grade
| Appearance | Exceedingly hard, green to bluish-black, iridescent, sharp crystalsexp.Measured value |
|---|---|
| Melting point | 2,600 °Cexp.Measured value |
| Boiling point | Sublimesexp.Measured value |
| Density | 3.2 g/cm³exp.Measured value |
| Solubility | INSOL IN COLD WATER, HOT WATER, & ACID, SOL IN FUSED POTASSIUM HYDROXIDEexp.Measured value |
| Vapour pressure | 0 mmHg (approx)exp.Measured value |
Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.
Computed descriptors
Calculated from the structure, useful for screening and formulation
| Molecular weight | 40.10 g/molcalc.Computed value |
|---|---|
| Exact mass | 39.9769 Dacalc.Computed value |
| LogP (octanol/water) | -0.3calc.Computed value |
| Topological polar surface area | 0 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 0calc.Computed value |
| Rotatable bonds | 0calc.Computed value |
| Heavy atoms | 2calc.Computed value |
| Rings | 0calc.Computed value |
| Aromatic rings | 0calc.Computed value |
| Fraction sp3 carbons | 0calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Safety and hazards
GHS classification summary, not a safety data sheet
Hazard statements
- H350iMay cause cancer by inhalation.
Precautionary statements (5)
- P203Obtain, read and follow all safety instructions before use.
- P280Wear protective gloves, protective clothing, eye protection and face protection.
- P318If exposed or concerned, get medical advice.
- P405Store locked up.
- P501Dispose of contents and container in accordance with local regulations.
GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.
Full safety data and first aidSilicon carbide suppliers
Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings
- India, Navi MumbaiUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- India, Mumbai ManufacturerUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- United States ManufacturerUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- India ManufacturerUnclaimed profileCarborundumGrade, purity and minimum order on requestPrice on request
- Price on request
- India, Jodhpur ManufacturerUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- China ManufacturerUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- China, YantaiUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- China, Hunan Changsha ManufacturerUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
- France, Saint-Cannat ManufacturerUnclaimed profileSilicon carbideGrade, purity and minimum order on requestPrice on request
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Where suppliers are based
66 suppliers in 16 countries
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Silicon carbide price
Indicative price range per kg from live supplier offers
Suppliers quote this chemical on request. Send one free request and compare quotes side by side.
Uses and applications
What the substance is used for, by industry and function
Polishing glass, granite, smoothing bisque ware, in sharpening stones, abrasive, manufacture (of) porcelain, "emery" paper and wheels, shoe soles, refractory brick, furnace linings, antiskid pavements, in semiconductor technology.
Component of treads & brake linings, component of heating elements for electrical furnaces, fibers in materials to resist high re-entry temps & rocket nozzle composites, component of thermistors & varistors, structural components in nuclear reactors, deoxidant in ferrous metallurgy.
Abrasive for cutting and grinding metals, grinding wheels, refractory in non-ferrous metallurgy, ceramic industry and boiler furnaces, composite tubes for steam reforming operations. Fibrous form used in filament-wound structures and heat-resistant, high-strength composites.
Industrial uses: Alloys, Other, Abrasives, Stabilizing agent, Hardener.
Consumer uses: Other, Abrasives, Semiconductor and photovoltaic agent.
Use classes: Processing Aids and Additives, Safer Chemical Classes.
Cosmetic ingredient, INCI name SILICON CARBIDE(abrasive)
Pharmacological actions
- Biocompatible Materials
Functional uses
- Abrasive
- Filler
- Processing aids not otherwise specified
Cosmetic functions
- Abrasive
How it is made
Reaction of silica sand and coke or anthracite coal at high temperatures.
Made by heating coke & sand (& salt as flux) in electric furnace.
Regulatory status
Inventories, regulations and trade controls that list this substance
Europe
- EU harmonised classification (CLP Annex VI)Index no: 014-048-00-5
Health and food
- EU cosmetic ingredient inventory
- EU Cosmetics Regulation Annex II, prohibited in cosmeticsName: Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1), Ref no: 1658, Annex ref: II/1658
United States
- Safer Choice ingredient list (USA)
- TSCA inventory (USA)Status: Active in US commerce
HS code and trade data
Customs classification and reported world trade statistics
Global trade
World import and export statistics for the HS code Silicon carbide is traded under.
Carbides of silicon, whether or not chemically defined
- United States22.5%
- Japan13.8%
- Germany10.9%
* Partner reported figures, a lower bound.
The HS code shown for Silicon carbide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.
Frequently asked questions
Quick answers about Silicon carbide, based on the data on this page
What is Silicon carbide?
What is Silicon carbide used for?
Is Silicon carbide hazardous?
Guides for buyers
Practical guides that help when you source, ship or handle Silicon carbide
- Guide, SafetyHow to read a safety data sheet in 10 minutesA section by section method to pull the essentials out of any 16 section SDS: identity, hazards, composition, storage, PPE, properties, transport and emergency measures.Read
- Guide, Trade and logisticsShipping dangerous goods: UN numbers, classes and packing groupsHow the UN dangerous goods system works for chemicals, from the nine classes and UN numbers to packing groups, UN packaging marks, labels, documents and segregation.Read
- Guide, SafetyGHS pictograms, signal words and hazard statements explainedA practical guide to the nine GHS pictograms, the signal words Danger and Warning, H and P statements, and how to read a chemical label in seconds.Read
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