1-Pentyl-3-Methylimidazolium Bromide stands out in the world of specialty chemicals as an ionic liquid with good chemical stability and relatively low volatility. This compound shows up in research labs and industrial setups looking for innovative ways to solve problems in synthesis, separation, or material processing. Its structure features a pentyl group bonded to a methylimidazolium core and counterbalanced by a bromide ion, shaping both its molecular properties and performance in applications. From preparing reaction media to acting as a raw material for further modifications, this ionic liquid’s role stretches across chemical research, advanced materials, and even niche areas like electrochemistry.
The molecular formula C9H17BrN2 and a molar mass of about 249.15 g/mol speak to its relatively heavy and substantial nature for an organic salt. In the solid state, 1-Pentyl-3-Methylimidazolium Bromide generally appears as white to off-white flakes, sometimes forming as powder, pearls, or even crystalline solids depending on manufacturing and storage conditions. It melts at temperatures usually between 70°C and 85°C, forming a viscous liquid that often remains clear and colorless. With a density close to 1.15 g/cm3 at room temperature, this compound packs more heft than typical solvents, yet handles easily in laboratory glassware or industrial containers.
The solubility of 1-Pentyl-3-Methylimidazolium Bromide in water and polar solvents opens up opportunities for use as a phase transfer catalyst and in forming homogeneous solutions for chemical transformations. The ionic nature makes it non-volatile under typical lab conditions, so you won’t see the same evaporative losses as with traditional organic solvents. Its chemical structure—imidazolium ring substituted at the 1 and 3 positions—gives it thermal stability and compatibility with a wide range of raw materials, supporting its use in battery electrolytes, catalyst supports, or material processing. In simple terms, this compound behaves consistently and predictably under regular storage, provided you keep it dry and away from strong oxidizers.
A look at the molecular structure of 1-Pentyl-3-Methylimidazolium Bromide reveals the imidazolium cation as the driver for its reactivity and ability to stabilize charged intermediates in both organic and inorganic synthesis. The five-carbon pentyl chain imparts moderate hydrophobicity, enhancing solubility in less polar organic phases, and broadening its application beyond aqueous systems. Key specifications often listed by suppliers include a purity of over 98%, and the material may be available in several grades—solid flakes for storing in jars, powdered form for rapid dissolution, or sometimes as pressed pearls for easy weighing. The HS Code generally used for this chemical falls under 2933.32, classifying it as a heterocyclic compound with nitrogen hetero-atom(s).
While handling 1-Pentyl-3-Methylimidazolium Bromide, basic chemical safety goes a long way. Skin contact and inhalation should be avoided, and in laboratory practice gloves, goggles, and lab coats prove their value on a daily basis. Many ionic liquids have a reputation for being less volatile and flammable than common organic solvents, but this property doesn’t remove all hazards—ingestion or direct contact can cause irritation. SDS sheets often classify it as “harmful if swallowed” and warn to keep it out of reach of children. Spills remain manageable thanks to its non-volatile solid state, but care around strong e-bases or oxidizers stays important since chemical reactions can occur. Disposal of residues or solutions should proceed in line with regional regulations; most waste produced from research or handling of ionic liquids requires chemical waste collection rather than simple drain disposal. Its relatively low vapor pressure means minimal inhalation risk, yet this should not lead to complacency about personal protective equipment.
Researchers and product developers look to 1-Pentyl-3-Methylimidazolium Bromide for its unique combination of solubility, ionic conductivity, and chemical inertness towards many common process contaminants. In my own time supporting synthesis labs, we used similar imidazolium-based salts to promote coupling reactions in water or green solvents—reducing reliance on more toxic, volatile organics. In materials chemistry, these ionic liquids lend themselves to making new polymer electrolytes or supporting separation processes where traditional solvents fall short. The path towards sustainable chemistry nudges companies and labs to try alternatives like these, especially when they face pressure to cut emissions or replace legacy solvents.
Production of 1-Pentyl-3-Methylimidazolium Bromide usually starts with basic imidazole derivatives and bromide sources, meaning the supply chain runs through well-established chemical manufacturing routes. Advanced material suppliers produce this salt at different purity levels, packed in jars, drums, or custom bags for transport. Shipping under UN numbers for non-flammable solids, and HS Code 2933.32, keeps it within regulatory frameworks. Supply fluctuations remain rare because the raw materials used—bromides and imidazole rings—are stable, readily available, and manufactured globally, supporting reliable procurement.
The material’s specifications—molecular formula C9H17BrN2, a density at approximately 1.15 g/cm3, and stable solid forms—make weighing and solution preparation straightforward for lab workers and engineers. Storage in cool, dry places prolongs shelf life, while tightly sealed containers prevent accidental moisture uptake, which could lead to clumping or slow degradation. I’ve pulled similar salts from storage after months without any drying steps required—so long as the cap fits tight and containers don’t see cycles of high humidity. Large-scale users may look to bulk forms, but research settings favor small solid flakes, pearls, or well-sealed vials of powder that dissolve quickly in warm solvents.
Though not classified as highly hazardous, 1-Pentyl-3-Methylimidazolium Bromide deserves respect as a synthetic chemical with known risks. Its imidazolium backbone offers versatility but also demands conscious disposal—never down the drain—since ionic liquids can persist in the environment and break down stubborn pollutants. Manufacturers and labs looking to green their footprint could work towards substituting this compound in applications where safer or easily biodegradable alternatives exist. At the same time, it pays to invest in staff training, proper labeling, and regular checks on container integrity to manage inventory safely over the long term.
Researchers and manufacturers continue to value the blend of ionic character, chemical stability, and ease of storage that 1-Pentyl-3-Methylimidazolium Bromide brings. Its solid forms—whether flakes, powders, or pearls—support safe transport and storage, while solutions in water or organic liquids allow flexibility for immediate use. Advances in green chemistry and regulations around hazardous materials will keep shaping how this compound fits into innovation pipelines. For now, its balance of manageable hazards and scientific utility keeps it in regular rotation across a range of chemical industries.
