Overview
Hemimellitene, or 1,2,3-trimethylbenzene, is a colorless liquid with a characteristic aromatic odor. It is one of the three isomers of trimethylbenzene, distinguished by the positions of the methyl groups on the benzene ring. This compound is primarily used as a solvent and intermediate in organic synthesis, playing a crucial role in the chemical industry. Hemimellitene is synthesized through the alkylation of toluene or xylene. Its unique structure and properties make it valuable in various industrial applications, particularly in the production of resins, dyes, and pharmaceuticals. Due to its high volatility and flammability, it requires careful handling and storage.
Physical and Chemical Properties
Hemimellitene exhibits typical aromatic hydrocarbon properties, including low solubility in water and high solubility in organic solvents. Its boiling point of 176.1 °C and melting point of -25.4 °C make it suitable for use in a range of temperatures. The compound's density is 0.89 g/cm³, which is lighter than water. Chemically, hemimellitene is stable under normal conditions but can react with strong oxidizing agents. Its flammability and volatility necessitate precautions during handling. The compound's aromatic nature contributes to its use as a solvent and intermediate in various chemical reactions.
Main Applications
Hemimellitene is widely used as a solvent in the production of resins, coatings, and adhesives. Its ability to dissolve a variety of organic compounds makes it valuable in industrial processes. Additionally, it serves as an intermediate in the synthesis of dyes, pharmaceuticals, and other specialty chemicals. In the pharmaceutical industry, hemimellitene is utilized in the manufacture of certain active pharmaceutical ingredients (APIs). Its role in organic synthesis extends to the production of complex molecules, where its reactivity and solubility are advantageous. The compound's applications are diverse, reflecting its importance in chemical manufacturing.
Safety and Storage
Due to its flammability, hemimellitene must be stored in a cool, well-ventilated area away from ignition sources. Proper grounding and bonding procedures should be followed to prevent static discharge. The compound is also an irritant to skin and eyes, requiring the use of personal protective equipment (PPE) such as gloves and goggles. In case of spills, absorbent materials should be used to contain the liquid, and the area should be ventilated. Disposal must comply with local environmental regulations. Safety data sheets (SDS) provide detailed handling and emergency response information, which should be reviewed before use.
B2B Procurement Guide
When procuring hemimellitene, it is essential to verify the purity and quality of the product. Suppliers should provide certificates of analysis (CoA) and material safety data sheets (MSDS). The reference price range is approximately $50-$100 per kilogram, depending on purity and supplier. Bulk purchases may offer cost advantages, but storage capacity and shelf life should be considered. Reliable suppliers with a track record of quality and compliance are preferred. Procurement professionals should also assess logistics and transportation requirements, ensuring safe and efficient delivery.
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