For any professional involved in chemical synthesis, understanding the precise specifications of the raw materials they procure is fundamental to ensuring successful outcomes. 1-Butyl-3-methylimidazolium Chloride (BMIMCl), identified by CAS number 79917-90-1, is a compound widely used as an organic synthesis intermediate and a precursor for ionic liquids. Grasping its key physical and chemical properties, along with typical quality parameters, is essential for procurement managers and research scientists alike.

The most commonly cited specification for 1-Butyl-3-methylimidazolium Chloride relates to its appearance and purity. Typically, it is described as a white to light yellow crystalline powder. While variations in color can sometimes occur due to trace impurities or slight oxidation, a deviation towards darker or inconsistent colors might warrant further investigation by the supplier. The purity is usually expressed as an assay, with a common standard being ≥99.0%, often determined by High-Performance Liquid Chromatography (HPLC). This high assay is critical for synthetic applications where even small amounts of impurities can impact reaction yields or introduce unwanted byproducts.

Beyond appearance and assay, several physical properties are vital for handling and application. The melting point is typically around 70°C, indicating its solid state under standard laboratory conditions. Its molecular formula is C8H15ClN2, with a corresponding molecular weight of approximately 174.67 g/mol. The flash point, an important safety parameter, is generally reported around 192°C (closed cup), signifying its relatively low flammability compared to many volatile organic solvents.

When sourcing 1-Butyl-3-methylimidazolium Chloride, it's also beneficial to consider other specifications that might be provided by a manufacturer. These can include moisture content (usually kept very low for optimal stability and reactivity), solubility characteristics (it is generally soluble in polar solvents like water and methanol), and even specific trace metal limits if the application is highly sensitive. For procurement managers, clearly defining these requirements with their chosen supplier, whether a domestic or international manufacturer, ensures that the delivered product aligns perfectly with the demands of the synthesis process. Having access to this detailed information empowers informed purchasing decisions and supports the consistent quality of end products.