Quinaldine
Overview
Quinaldine, also known as 2-methylquinoline, is a heterocyclic aromatic compound derived from quinoline. It is a colorless to pale yellow liquid with a distinct aromatic odor. Quinaldine is primarily used as an intermediate in the synthesis of dyes, pharmaceuticals, and agrochemicals. Its molecular structure consists of a benzene ring fused to a pyridine ring with a methyl group at the 2-position. This structure imparts unique chemical properties, making it valuable in various industrial applications. Quinaldine is produced through the Skraup synthesis or by alkylation of quinoline.
Physical and Chemical Properties
Quinaldine has a molecular weight of 143.19 g/mol and a density of 1.058 g/cm³ at 20°C. It is a flammable liquid with a boiling point of 246-247°C and a melting point of -2°C. The compound is soluble in most organic solvents but only slightly soluble in water. Quinaldine exhibits typical aromatic properties, including resonance stability and electrophilic substitution reactions. It reacts with strong oxidizing agents and should be handled with care to avoid hazardous situations. The compound's vapor can form explosive mixtures with air, necessitating proper ventilation during use.
Main Applications
Quinaldine is widely used as a chemical intermediate in the production of dyes, particularly for creating bright and stable colorants. It serves as a precursor in the synthesis of pharmaceuticals, including antimalarial drugs and other medicinal compounds. In the agrochemical industry, quinaldine derivatives are employed as fungicides and insecticides. The compound is also used in research and development for creating new materials and studying chemical reactions. Its versatility makes it a valuable component in various industrial processes.
Safety and Storage
Quinaldine is classified as harmful if swallowed and can cause skin and eye irritation. It is a flammable liquid, requiring storage in a cool, dry, well-ventilated area away from heat sources and oxidizing agents. Proper personal protective equipment (PPE), such as gloves and goggles, should be worn when handling the compound. In case of spills, absorb with inert material and dispose of according to local regulations. Emergency procedures should include ventilation and avoidance of ignition sources. Always refer to the material safety data sheet (MSDS) for detailed safety guidelines.
B2B Procurement Guide
When procuring quinaldine, B2B buyers should verify the required purity level, as it can significantly impact the price and suitability for specific applications. Ensure the supplier complies with relevant regulatory standards, such as REACH or FDA guidelines, depending on the intended use. Consider the packaging options, such as drums or bulk containers, and confirm that the supplier provides proper labeling and safety data sheets. Establish a reliable supply chain to avoid disruptions, and negotiate pricing based on volume and long-term contracts. Always conduct quality checks upon receipt of the material.
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