Overview
Copper(I) iodide (CuI) is an inorganic compound consisting of copper and iodine in a 1:1 ratio. It is a versatile material with applications spanning organic synthesis, catalysis, and semiconductor technology. The compound is known for its white to off-white crystalline appearance and its stability under standard conditions. CuI is commercially available in various purity grades, with 99% and higher purity being common for industrial applications. Its unique properties, such as photosensitivity and catalytic activity, make it valuable in specialized chemical processes and advanced material sciences.
Physical and Chemical Properties
Copper(I) iodide is characterized by its high density (5.62 g/cm³) and relatively high melting point (605°C). It is insoluble in water but dissolves in solutions containing ammonia or potassium iodide, forming complexes. The compound exhibits semiconductor properties and is sensitive to light, which is exploited in photovoltaic applications. CuI is stable under normal conditions but can decompose upon exposure to strong oxidizing agents. Its crystalline structure and electronic properties have been studied extensively for use in optoelectronic devices, where it serves as a hole-transport material.
Main Applications
In organic synthesis, CuI is widely used as a catalyst in coupling reactions, such as the Ullmann reaction and Sonogashira coupling. Its ability to facilitate carbon-heteroatom bond formation makes it indispensable in pharmaceutical and agrochemical manufacturing. Beyond chemistry, CuI is employed in cloud seeding to induce rainfall and in the production of photovoltaic cells. Its semiconductor properties are leveraged in dye-sensitized solar cells and other optoelectronic devices, where it enhances charge transport efficiency.
Safety and Storage
Copper(I) iodide is classified as an irritant and should be handled with care to avoid inhalation or ingestion. Proper personal protective equipment (PPE), including gloves and goggles, is recommended when working with this compound. Storage conditions are critical to maintaining CuI's stability. It should be kept in a cool, dry place, protected from light and moisture. Containers must be tightly sealed to prevent degradation and contamination, which could affect its performance in sensitive applications.
B2B Procurement Guide
When procuring copper(I) iodide, industrial buyers should prioritize suppliers with certified quality control processes. Key specifications to verify include purity (typically ≥99%), particle size, and moisture content. Packaging should be moisture-proof, often with double-layer bags or desiccants included. Pricing varies based on quantity and purity, with bulk purchases often attracting discounts. Lead times can differ among suppliers, so it's advisable to plan procurement well in advance, especially for large-scale or time-sensitive projects.
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