Furan
Also known as Divinylene oxide, Tetrole, Furfuran
Key facts
What buyers check first
- Appearance
- Colorless liquid, turns brown upon standing, color change is retarded if a small amount…
- Melting point
- -85.6 °C
- Boiling point
- 31.5 °C
- Density
- 0.9514 g/cm³ at 20 °C
- Flash point
- -35 °C
- HS code
- 293219
- Category
- Insecticides and acaricides
- UN number
- UN 2389
What is Furan?
Plain description, key identifiers and synonyms
Furan is a monocyclic heteroarene with a structure consisting of a 5-membered ring containing four carbons and one oxygen, with formula C4H4O. It is a toxic, flammable, low-boiling (31C) colourless liquid. It has a role as a carcinogenic agent, a hepatotoxic agent and a Maillard reaction product. It is a member of furans, a mancude organic heteromonocyclic parent and a monocyclic heteroarene.
Identifiers
Registry numbers, names and line notations, tap to copy
- IUPAC name
- furan
- CAS number
- 110-00-9 CAS number cross-checkedOther or deprecated CAS: 25067-54-3
- EC number
- 203-727-3
- Molecular formula
- C4H4O
- UNII
- UC0XV6A8N9
- MDL number
- MFCD00003222
- InChIKey
- YLQBMQCUIZJEEH-UHFFFAOYSA-N
- InChI
- InChI=1S/C4H4O/c1-2-4-5-3-1/h1-4H
- SMILES (canonical and isomeric)
- C1=COC=C1
Synonyms
- Divinylene oxide
- Tetrole
- Furfuran
- Oxacyclopentadiene
- Oxole
- Furane
- 1,4-Epoxy-1,3-butadiene
- Axole
- Oxycyclopentadiene
- RCRA waste number U124
- Furfurane
- tetrole oxide
- Furan (98%)
- Furan (stabilized with BHT)
- RCRA waste no. U124
- beta-furan
- Oxol
- furan-
- 2-Furan
- Furan, 98%
- Furan, analytical standard
- Furan, >=99%
- 5-17-01-00291 (Beilstein Handbook Reference)
- Furan 1000 microg/mL in Methanol
- Furan 100 microg/mL in Acetonitrile
Show all 28 synonymsShow fewer synonyms
- UN 2389
- Furan [UN2389] [Flammable liquid]
- Furan Solution in Methanol, 1000_g/mL
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 | Colorless liquid, turns brown upon standing, color change is retarded if a small amount of water is addedexp.Measured value |
|---|---|
| Odour | Etherealexp.Measured value |
| Melting point | -85.6 °Cexp.Measured value |
| Boiling point | 31.5 °Cexp.Measured value |
| Density | 0.9514 g/cm³ at 20 °Cexp.Measured value |
| Flash point | -35 °Cexp.Measured value |
| Autoignition temperature | 390 °Cexp.Measured value |
| Solubility | In water, 1 × 10⁺⁴ mg/L at 25 °Cexp.Measured value |
| Vapour pressure | 600 mm Hg at 25 °C /from experimentally derived coefficients/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 | 68.08 g/molcalc.Computed value |
|---|---|
| Exact mass | 68.0262 Dacalc.Computed value |
| LogP (octanol/water) | 1.28calc.Computed value |
| Topological polar surface area | 13.14 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 1calc.Computed value |
| Rotatable bonds | 0calc.Computed value |
| Heavy atoms | 5calc.Computed value |
| Rings | 1calc.Computed value |
| Aromatic rings | 1calc.Computed value |
| Fraction sp3 carbons | 0calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
| Lipinski rule of five | Passes (0 violations)calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Murcko scaffold
The ring system that remains when every side chain is removed
c1ccoc1
1 ring, 5 atoms. This chemical is the scaffold itself.
12,988 other chemicals share this scaffoldSafety and hazards
GHS classification summary, not a safety data sheet
Hazard statements
- H224Extremely flammable liquid and vapour.
- H302Harmful if swallowed.
- H315Causes skin irritation.
- H332Harmful if inhaled.
- H341Suspected of causing genetic defects.
- H350May cause cancer.
- H373May cause damage to organs through prolonged or repeated exposure.
- H412Harmful to aquatic life with long lasting effects.
Precautionary statements (29)
- P203Obtain, read and follow all safety instructions before use.
- P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- P233Keep container tightly closed.
- P240Ground and bond container and receiving equipment.
- P241Use explosion-proof electrical, ventilating and lighting equipment.
- P242Use non-sparking tools.
- P243Take action to prevent static discharges.
- P260Do not breathe dust, fume, gas, mist, vapours or spray.
- P261Avoid breathing dust, fume, gas, mist, vapours or spray.
- P264Wash skin thoroughly after handling.
- P270Do not eat, drink or smoke when using this product.
- P271Use only outdoors or in a well-ventilated area.
- P273Avoid release to the environment.
- P280Wear protective gloves, protective clothing, eye protection and face protection.
- P301 + P317If swallowed: Get medical help.
- P302 + P352If on skin: Wash with plenty of water.
- P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
- P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
- P317Get medical help.
- P318If exposed or concerned, get medical advice.
- P319Get medical help if you feel unwell.
- P321Specific treatment (see supplemental first aid instructions on the label).
- P330Rinse mouth.
- P332 + P317If skin irritation occurs: Get medical help.
- P362 + P364Take off contaminated clothing. And wash it before reuse.
- P370 + P378In case of fire: Use appropriate media to extinguish.
- P403 + P235Store in a well-ventilated place. Keep cool.
- P405Store locked up.
- P501Dispose of contents and container in accordance with local regulations.
- UN number
- UN 2389
- Transport hazard class
- 3
- Packing group
- I
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 aidFuran suppliers
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- China, Siping ManufacturerUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
- ChinaUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
- France, Saint-Thibault-des-VignesUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
- Price on request
- United States, Memphis ManufacturerUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
- United States, Memphis ManufacturerUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
- United StatesUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
- United States, San DiegoUnclaimed profileFuranGrade, purity and minimum order on requestPrice on request
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Where suppliers are based
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Furan price
Indicative price range per kg from live supplier offers
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Uses and applications
What the substance is used for, by industry and function
Chemical intermediate for tetrahydrofuran.
Organic synthesis, especially for pyrrole, tetrahydrofuran, thiophene.
Used mainly in the preparation of specialty chemicals such as alpha-acetylfuran, 2,5-dimethoxy-2,5-dihydrofuran, 2,2-difurylpropane, 2,2-di(tetrahydrofurfuryl)propane, and pyrrole derivatives.
Furan is ... used in the formation of lacquers, as a solvent for resins, and in the production of agricultural chemicals (insecticides), stabilizers, and pharmaceuticals.
Industrial uses: Intermediate.
Industries and functions
Roles
- Maillard reaction product
- aetiopathogenetic role
- carcinogenic agent
- hepatotoxic agent
- thermal degradation product
Pharmacology
Furan is a clear, colorless, flammable liquid cyclic ether with an ethereal odor. Furan is used as an intermediate in the production of tetrahydrofuran, pyrrole and thiophene. Inhalation exposure to this substance causes eye and skin irritation and central nervous system depression. Furan is mutagenic in animals and is reasonably anticipated to be a human carcinogen based on evidence of carcinogenicity in experimental animals. (NCI05)
How it is made
Prepared by decarboxylation of 2-furancarboxylic acid. Has been prepared directly from furfural over hot soda-lime or by dropping furfural on fused mixture of sodium and potassium hydroxides.
Dry distillation of furoic acid from furfural.
By heating furfural in the liquid phase in the presence of a palladium catalyst.
Regulatory status
Inventories, regulations and trade controls that list this substance
Europe
- EU harmonised classification (CLP Annex VI)Index no: 603-105-00-5
Health and food
- EU Cosmetics Regulation Annex II, prohibited in cosmeticsName: Furan, Ref no: 732, Annex ref: II/732
United States
- 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 Furan is traded under.
Compounds containing an unfused furan ring (whether or not hydrogenated) in the…
The HS code shown for Furan is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.
Related chemicals
Parent and salt forms, stereoisomers, similar structures and isomers
Salt and hydrate forms
Records that share this compound as their parent
Stereoisomers and isotopic forms
Same connectivity, different stereochemistry or isotopes (same InChIKey skeleton)
Similar structures
Nearest neighbours by Morgan fingerprint Tanimoto similarity
Same formula isomers
Different compounds that share this molecular formula
Frequently asked questions
Quick answers about Furan, based on the data on this page
What is Furan?
What is the CAS number of Furan?
What is the molecular formula and weight of Furan?
What is Furan used for?
Is Furan hazardous?
What is the HS code of Furan?
Where can I buy Furan?
What is the price of Furan?
Guides for buyers
Practical guides that help when you source, ship or handle Furan
- 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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