Furfural CAS 98-01-1

Introduction to Furfural

Furfural, also referred to as 2-furaldehyde, is an aromatic heterocyclic compound with an aldehyde group bonded to the 2-position of a furan ring. Freshly distilled material appears as a clear, colorless oily liquid, and gradually darkens to yellow or amber tone upon exposure to air and light. The compound carries a pungent, almond-like odor. It dissolves readily in most common organic solvents and shows limited miscibility with water at room temperature.

Industrial production follows acid-catalyzed hydrolysis of pentosan-rich agricultural residues including corn cobs, sugarcane bagasse and rice hulls. Released pentose sugars undergo cyclodehydration to form crude furfural, which is then isolated via steam distillation and further refined through vacuum distillation. The aldehyde group on the furan ring supports oxidation, reduction, condensation and Cannizzaro reactions, establishing the material as a widely used platform chemical across multiple industrial value chains.

Chemical & Physical Properties

Applications

Furan resin and polymer feedstock: Serves as the primary raw material for furfuryl alcohol, furan resins and phenolic-furan resin production. These resins deliver high heat resistance, chemical corrosion resistance and dimensional stability for foundry sand binders, refractory materials and corrosion-resistant coating systems.

Petroleum refining selective solvent: Applied in lubricating oil refining processes to selectively extract aromatic components and unsaturated hydrocarbons. It improves viscosity index and oxidation stability of base oils, and also supports purification of butadiene and other diolefins in petrochemical separation units.

Fine chemical and pharmaceutical intermediate: Acts as a starting material for manufacturing furoic acid, tetrahydrofuran, pyran derivatives and other pharmaceutical intermediates. It also serves as a precursor for flavor compounds, insecticides and agricultural chemical active ingredients.

Industrial preservative and wood treatment: Incorporated into select industrial water systems and wood treatment formulations for its fungistatic and preservative properties. It also works as a reactive solvent in certain specialty coating and adhesive formulations.

Storage & Safety Precautions

• Store in tightly sealed stainless steel or carbon steel drums in a cool, dark and ventilated flammable liquid warehouse. Keep away from open flame, heat sources and strong oxidizing agents. Protect from direct sunlight to slow color darkening and resinification.
• Wear chemical splash goggles, butyl rubber gloves and flame-resistant work clothing during transfer operations. Use local exhaust ventilation to control vapor concentration. The compound causes irritation to skin, eyes and respiratory tract, and may induce systemic effects with prolonged or repeated exposure.
• Bond and ground all containers and transfer lines to prevent static buildup. Do not store alongside strong acids, bases or oxidizers. Inspect drums regularly for discoloration and leakage. Material held in extended inventory should be retested for purity and acidity before production use.

Furfural FAQ

Q: What primary industrial roles does Furfural serve?

A: Furfural acts mainly as a platform chemical for furan resin and furfuryl alcohol production. It also works as a selective solvent in lubricating oil refining and butadiene purification, and serves as an intermediate for pharmaceutical, agrochemical and flavor compound synthesis.

Q: Does Furfural change in appearance during normal storage?

A: Freshly distilled Furfural appears colorless and clear. It gradually darkens to yellow or amber when exposed to air and light due to oxidation and slow resinification. Store sealed in dark, cool areas to slow color change and preserve product purity and reactivity.

Q: What storage and handling rules apply to bulk industrial Furfural?

A: Store Furfural in sealed drums in a cool, dark flammable liquid warehouse away from oxidizers and direct heat. Ground all transfer equipment to prevent static discharge. Wear appropriate PPE and use local exhaust ventilation to control vapor exposure during handling operations.