Overview
Ammonium iodide (NH4I) is an inorganic salt composed of ammonium and iodide ions. It is commonly encountered as a white crystalline solid with high solubility in water. The compound is primarily used in industrial and laboratory settings due to its iodine content. In B2B contexts, ammonium iodide is traded as a reagent or raw material for specialized applications. Its procurement requires attention to purity grades, as impurities can affect performance in sensitive processes like pharmaceutical manufacturing.
Physical and Chemical Properties
Ammonium iodide exhibits hygroscopic properties, meaning it readily absorbs moisture from the air. This characteristic necessitates airtight storage to prevent clumping or degradation. When heated, it sublimes at 551°C, decomposing into ammonia and hydrogen iodide gases. The compound's high solubility in water (approximately 1,550 g/L at 20°C) makes it useful in liquid-phase reactions. Its iodine content lends itself to applications requiring iodide ions, such as in organic synthesis or as a source of iodine in nutritional supplements.
Main Applications
In pharmaceuticals, ammonium iodide serves as an expectorant in cough medicines and as a precursor for iodine-containing drugs. The photography industry utilizes it in emulsion formulations for silver iodide production. Chemical synthesis employs NH4I as a catalyst or reactant in various organic transformations, particularly in nucleophilic substitution reactions. Laboratories use it as a reagent for iodide ion sources or in analytical chemistry procedures. Emerging applications include use in perovskite solar cells and other advanced materials.
Safety and Storage
Ammonium iodide requires careful handling due to its potential to cause irritation to skin, eyes, and respiratory system. Proper PPE including gloves and goggles should be worn when handling the powder. In case of exposure, affected areas should be flushed with water. Storage recommendations include keeping containers tightly sealed in cool, dry conditions, separated from incompatible substances such as strong oxidizers. Bulk storage areas should have adequate ventilation to prevent accumulation of any decomposition products.
B2B Procurement Guide
When sourcing ammonium iodide commercially, buyers should specify required purity levels, which typically range from 98% to 99.9% for different applications. Pharmaceutical-grade material requires additional certifications and testing documentation. Packaging options include 25kg drums, 1kg bottles, or custom quantities. Lead times may vary based on purity specifications and quantity. Reputable suppliers should provide material safety data sheets (MSDS) and certificates of analysis. For large orders, consider requesting samples for quality verification before full shipment.
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