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Bromobutane, also known by its chemical formula C4H9Br, belongs to the group of alkyl halides known for their practical roles in both laboratory work and industrial manufacturing. Whether you recognize it as n-Bromobutane, 1-Bromobutane, or simply as an organobromine compound, you’ll find it in processes ranging from pharmaceuticals to specialty chemicals production. Its structure features a four-carbon chain with a bromine atom attached to one end, giving it properties distinct from other butane isomers and halogenated organics.
Bromobutane takes the form of a colorless liquid under standard temperature and pressure, carrying a faintly sweet odor with a slight bracing note that often comes with brominated solvents. With a molecular weight of 137.02 g/mol and a density of about 1.27 g/cm³ at 20°C, it is denser than water and sinks upon mixing. The boiling point usually ranges around 101°C, making it a moderate volatility compound that calls for prudent handling to reduce losses through evaporation. In laboratory and industrial use, n-Bromobutane generally shows as a clear, free-flowing liquid, but exposure to air and light can lead to discoloration over time, especially if stored poorly.
Solubility data puts bromobutane in the category of sparingly soluble in water—it floats on water rather than mixing. On the other hand, it dissolves well in organic solvents like alcohol, ether, and chloroform, which gives it value in organic synthesis. If you work with it, you’ll notice it has low electrical conductivity and resists chemical attack in most neutral environments. But it will react with nucleophiles such as ammonia, amines, and some metals, making it a useful alkylating agent in chemical transformations.
The carbon backbone of bromobutane gives it a straight-chain configuration. The presence of bromine on the terminal carbon introduces a reactive site ideal for substitution reactions—think of it as an approachable entry point for a wide variety of synthesis steps in molecular chemistry. The formula, C4H9Br, draws its molecular structure from butane (C4H10), with a hydrogen replaced by a bromine atom. This swap boosts reactivity and leaves a distinct signature on mass spectrometry or NMR readings. For those who inspect fine details, the molecule presents a tetrahedral geometry at each carbon, giving predictable reaction patterns in both lab and manufacturing setups.
Raw n-Bromobutane comes in several purities and packaging volumes, reflecting its broad utility. HS Code for global trade use falls under 2903.39, which tracks the import and export of halogenated butanes globally. Industrial users often request bromobutane in bulk—sold by the drum, liter, or kilogram. Some applications call for higher-purity grades for pharmaceuticals or organic synthesis, while more standard grades fit well with intermediate or agricultural chemical preparation. Downstream industries transform bromobutane into active pharmaceutical ingredients, lubricants, surfactants, and specialty plastics, adding substantial value to everything from solvents to ion-exchange resins.
Bromobutane can enter the supply chain as a technical-grade liquid, typically stored in sealed metal or amber glass containers to guard against both moisture uptake and ultraviolet-induced degradation. Material safety data supplied with shipments highlight flash points, vapor densities, and regulatory numbers to streamline both compliance and safe logistics.
Bromobutane is flagged as flammable, and storage should avoid sources of ignition. The vapor can irritate eyes, skin, and respiratory passages, especially in closed or poorly ventilated spaces. Repeated exposure may lead to headaches, dizziness, or, in higher concentrations, nervous system effects. Every container carries warning labels reflecting its status as both a hazardous and harmful substance under GHS—Emergency responders should prepare for chemical spill protocols and suitable protective equipment.
Handling and disposal must follow local, national, and international environmental and safety rules. Spills, even minor, require quick cleanup with absorbent material and proper ventilation, as inhalation risk increases with evaporation. Bromobutane never belongs in ordinary waste streams or drains; it enters approved waste handling cycles, designed for halogenated organic chemicals. Employers should train workers on chemical hygiene, accident response, and personal protective equipment for both routine use and emergency scenarios.
Safer workspaces depend on containment and control. Ready access to fume hoods, chemical spill kits, and fire extinguishers can mean the difference between a routine day and a major incident. Continuous monitoring of air quality and periodic health checks give early warnings if thresholds are breached. Material compatibility checks—including non-reactive storage containers and regular inspection of seals—help guard against leaks. Distribution channels benefit most when shipping firms and end-users coordinate on temperature management, spill prevention, and responsible disposal.
Industry trends support greener and less harmful alkylating agents wherever feasible, but for now, bromobutane remains widely used thanks to its reliability and performance in key organic transformations. Vendors must keep information updated, offering technical and safety resources in addition to the product itself. Outreach to buyers about both hazards and safe use practices help reduce accidents. Regulatory compliance, particularly under shifting environmental standards, means regular review of safety data sheets and hazard labels is not just a box-ticking exercise but part of a meaningful risk reduction strategy.
