What Is a Furan?
Furan (oxole) is the simplest oxygen-containing five-membered heterocyclic compound [1] . It exists in pine tar, is a colorless liquid, has a boiling point of 32 ° C, has a odor similar to chloroform, is difficult to dissolve in water, and is easily soluble in organic solvents. When its vapor meets the pine wood chips soaked with hydrochloric acid, it appears green, which is called pine reaction, and can be used to identify the presence of furan. It has narcotic and weak stimulating effects and is extremely flammable. Inhalation can cause headache, dizziness, nausea, and respiratory failure. The furan ring has an aromatic ring property, and can undergo electrophilic substitution reactions such as halogenation, nitration, and sulfonation. It is mainly used in organic synthesis or as a solvent.
- Due to the pair of oxygen atoms in its molecule
- Used to make pyrrole,
- Appearance and properties: colorless liquid with mild fragrance.
- Melting point (° C): -85.6
- Boiling point (° C): 31.4
- Relative density (water = 1): 0.9514
- Relative vapor density (air = 1): 2.35
- Combustion heat (kJ / mol): 2090.4
- Flash point (): -35
- Ignition temperature (° C): 390
- Upper explosion limit% (V / V): 14.3
- Lower explosion limit% (V / V): 1.3
- Solubility: Insoluble in water, soluble
- Incompatibility:
- Disposal methods: Please refer to relevant national and local regulations before disposal. It is recommended to dispose by incineration.
- Dangerous Goods Number: 31040
- UN Number: 2389
- Packing category: O51
- Packaging method: small opening steel barrel; ordinary wooden box outside ampoules; threaded glass bottle, iron cap glass bottle, plastic bottle or metal barrel (can) outside ordinary wooden box
- Attentions in transportation: The transportation vehicle should be equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment during transportation. Summer is best to transport in the morning and evening. The tank (tank) truck used for transportation should have a grounding chain, and a hole partition can be set in the tank to reduce vibration and generate static electricity. It is strictly forbidden to mix and transport with oxidants and acids. During transportation, it should be protected from direct sunlight, rain and high temperature. Stay away from fire, heat sources, and high temperature areas during a stopover. The exhaust pipe of the vehicle carrying this item must be equipped with a fire arrester, and the use of mechanical equipment and tools that are prone to sparks is prohibited. When transporting by road, follow the prescribed route and do not stop in residential areas and densely populated areas. Railroad transportation is prohibited. It is strictly forbidden to use wooden ships and cement ships for bulk transportation.
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fura [1,3] dioxol-2-on | (3ar, 7ac) -3a, 4,7,7a-tetrahydro-4x, 7x-epoxido-benzo [1,3] dioxol-2-on |
Reaction temperature 123-127 Yield 23% Reaction condition 2 Reaction temperature 127 |
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