Magnesium Chloride Flakes consist chemically of magnesium chloride hexahydrate (MgCl2·6H2O). The hexahydrate form contains six water molecules bound within the crystalline structure, which accounts for its flaky appearance and high water solubility. When introduced to moisture, the flakes rapidly dissolve, liberating Mg2+ and Cl- ions that interact beneficially in various chemical processes.
The hygroscopic nature of magnesium chloride means it readily attracts ambient moisture, making it effective in dust suppression on unpaved roads by retaining surface water through ionic bonding and reducing airborne particulate matter. In road maintenance, it lowers the freezing point of water by disrupting ice formation, enabling safer travel in cooler conditions.
In industrial manufacturing, magnesium chloride acts as a coagulant by facilitating particle aggregation during paper and textile processing. It destabilizes colloidal suspensions, allowing finer particulate matter to clump and separate efficiently. The chemical also plays a role in refractory and cement formulations, where it contributes to accelerated curing and improved strength by promoting ionic exchange and hydration reactions.
Performance qualities to note include its high solubility (over 50 grams per 100 mL of water at 20°C) and its stability under typical storage conditions if kept dry. Its CAS number (7791-18-6) confirms its standardized identity. Purity and grade details vary; buyers should confirm specifications with the supplier for application-critical parameters. Given its moisture sensitivity, packaging and storage are integral to maintaining product integrity and consistent performance in operational use.