Furan
CAS Number
110-00-9
EC Number
203-727-3
What is Furan?
Furan (CAS 110-00-9), also known as furfurane or tetrole, is a five-membered oxygen-containing heterocyclic compound used as a reactive building block and solvent in chemical synthesis.
Where is Furan used?
- Polymer chemistry: monomer in Diels-Alder-based systems for thermally reversible resins and bio-based plastics with controlled crosslinking
- Pharmaceuticals: synthetic intermediate in drug scaffolds and active pharmaceutical ingredients
- Laboratory and pilot-plant synthesis: low-boiling solvent for rapid removal
- It also serves as a starting material for tetrahydrofuran (THF) and other downstream derivatives.
Good to know: Buyers should confirm stabilizer content and purity grade, commonly 99%+, when specifying for pharmaceutical or polymer synthesis.
Commercial specifications
- Packaging from small laboratory quantities to bulk drums, depending on purity requirements
- Purity grade commonly 99%+
Other Names (Synonyms)
tetrole|furfurane|furfuran|divinylene oxide|1,4-epoxy-1,3-butadiene|Oxole|Furane|Axole
What are the physical properties of Furan?
Melting Point -85.6 °C
Boiling Point 31.36 °C @ Press: 760 Torr
Density 0.9371 g/cm³ @ Temp: 19.4 °C
Flash Point 160 °F
Appearance Furan is a colorless liquid; turns brown on standing. Strong ethereal odor.
Color Clear colorless to yellow
Odor Ethereal
Form Liquid
Water Solubility insoluble
Vapor Pressure 1672 mm Hg ( 55 °C)
Refractive Index n 20/D 1.5070(lit.)
Log P 1.34
How is Furan classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard GHS06· Toxic
Hazard Statements
H224 Extremely flammable liquid and vapor
H302 Harmful if swallowed
H315 Causes skin irritation
H331 Toxic if inhaled
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
Which trade and regulatory codes apply to Furan?
HS Code 2932 19 00
UN Number 2811
ADR Class 6.1
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 3