Overview
8-Hydroxyquinoline, also known as oxine, is a heterocyclic organic compound with the formula C9H7NO. It is a derivative of quinoline and is notable for its ability to form stable complexes with various metal ions. This property makes it valuable in numerous industrial and pharmaceutical applications. The compound was first synthesized in the late 19th century and has since become a cornerstone in chelation chemistry. Its versatility stems from its dual functionality as both a weak acid and a weak base, allowing it to interact with a wide range of substances.
Physical and Chemical Properties
8-Hydroxyquinoline appears as a white to yellowish crystalline powder with a faint characteristic odor. It has a melting point of 76-78°C and a boiling point of 267°C. The compound is soluble in organic solvents like ethanol and acetone but only slightly soluble in water. One of its most significant chemical properties is its ability to chelate metal ions, forming stable complexes. This chelation occurs through the hydroxyl and nitrogen groups, which can coordinate with metals such as copper, iron, and aluminum. The resulting complexes often have distinct colors, making 8-hydroxyquinoline useful in analytical chemistry.
Main Applications
8-Hydroxyquinoline is widely used in the pharmaceutical industry as an antiseptic and antifungal agent. It is a key ingredient in topical treatments for skin infections and wound care products. Additionally, its metal-chelating properties make it valuable in metal extraction processes, particularly in hydrometallurgy. In agriculture, it serves as a fungicide and preservative for crops and wood. The compound is also employed in the production of dyes, pigments, and as a stabilizer in polymers. Its versatility ensures demand across multiple industries, from healthcare to manufacturing.
Safety and Storage
While 8-hydroxyquinoline is generally safe when handled properly, it can be harmful if ingested or inhaled. Prolonged exposure may cause skin and eye irritation, so protective equipment such as gloves and goggles is recommended during handling. Storage should be in a cool, dry place away from direct sunlight and moisture to prevent degradation. The compound should be kept in tightly sealed containers to avoid contamination and ensure long-term stability.
B2B Procurement Guide
When procuring 8-hydroxyquinoline, B2B buyers should prioritize suppliers who provide detailed product specifications and a Certificate of Analysis (COA). The COA ensures the product meets the required purity standards, which is critical for industrial and pharmaceutical applications. Buyers should also consider the form of the product (powder or solution) and the packaging options available. Bulk purchases typically offer cost savings, but storage capacity and shelf life should be factored into procurement decisions.
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