Overview
1-Butanol (n-butanol) is a four-carbon primary alcohol extensively used in industrial applications. It occurs naturally in small quantities as a byproduct of fermentation and is primarily manufactured via petrochemical processes like the oxo synthesis. Its balanced solvent properties and reactivity make it valuable across multiple sectors. As a mid-chain alcohol, 1-butanol bridges the gap between short-chain alcohols (like ethanol) and longer-chain varieties in terms of evaporation rate, solvency power, and compatibility with resins. This versatility underpins its widespread adoption in coatings, adhesives, and specialty chemical production.
Physical and Chemical Properties
1-Butanol is a colorless, flammable liquid with a distinct alcoholic odor. Its moderate polarity allows it to dissolve both polar and non-polar substances, making it an effective solvent for paints, varnishes, and resins. The compound's boiling point (117.7°C) suits applications requiring gradual evaporation. Chemically, it undergoes typical alcohol reactions including esterification, oxidation to butyraldehyde, and dehydration to butenes. Its hygroscopic nature necessitates moisture-proof storage to maintain purity. The autoignition temperature (340°C) and flash point (35°C) mandate careful handling to prevent fire hazards.
Main Applications
The largest application of 1-butanol is as a solvent in coatings (30-40% of global demand), particularly for nitrocellulose lacquers and epoxy resins. Its slow evaporation rate ensures smooth film formation in automotive and industrial paints. In chemical synthesis, it serves as a precursor for butyl acrylate (used in adhesives) and plasticizers like dibutyl phthalate. Emerging uses include biofuel blending, where it offers higher energy density than ethanol. Niche applications encompass pharmaceutical extraction and fragrance formulation.
Safety and Storage
As a flammable liquid (Class II), 1-butanol requires storage in grounded containers away from oxidizers and heat sources. Secondary containment is recommended to manage spills. Ventilation systems should maintain vapor concentrations below 50 ppm (ACGIH TLV). Personal protective equipment (PPE) including chemical goggles, gloves (nitrile or neoprene), and flame-resistant clothing is essential during handling. Spills should be absorbed with inert materials and disposed as hazardous waste. Never use water jets on large fires due to risk of vapor cloud formation.
B2B Procurement Guide
Industrial buyers should specify required purity (typically 99-99.9%), with higher grades needed for pharmaceutical applications. Bulk shipments (ISO tanks or flexitanks) offer cost advantages for quantities above 5 metric tons. Evaluate suppliers for ISO 9001 certification, batch traceability, and SDS compliance. Regional pricing varies: North American contracts often include railcar delivery options, while Asian suppliers may offer competitive spot prices. Consider long-term agreements to hedge against feedstock (propylene) price fluctuations.
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