Isophthaloyl dichloride, with the CAS number 99 - 63 - 8, is an important industrial chemical. It is a colorless to light - yellow liquid at room temperature. The molecular formula of isophthaloyl dichloride is C₈H₄Cl₂O₂, and its molecular weight is approximately 203.02 g/mol. This product is offered at a low price by our factory, providing a cost - effective solution for various industries.
It has a melting point of around 43 - 44°C and a boiling point of about 276.5°C. Isophthaloyl dichloride is insoluble in water but soluble in common organic solvents such as benzene, toluene, and chloroform. The purity of the factory - supplied isophthaloyl dichloride is carefully controlled to meet high - quality standards, ensuring its performance in different applications.
Isophthaloyl dichloride has a wide range of uses in different industries. In the field of polymer chemistry, it is a key monomer for the synthesis of high - performance polymers. For example, it is used in the production of aromatic polyamides, also known as aramids. Aramids are known for their excellent mechanical properties, high - temperature resistance, and chemical stability. They are widely used in aerospace, automotive, and protective clothing industries.
It is also used in the synthesis of polyesters. These polyesters have good heat resistance and mechanical strength, making them suitable for applications in electrical insulation, packaging, and engineering plastics. Additionally, isophthaloyl dichloride can be used in the production of dyes, pigments, and pharmaceuticals. In the dye industry, it can be used as an intermediate to introduce specific functional groups, improving the color - fastness and other properties of dyes.
When using isophthaloyl dichloride, proper safety measures should be taken. It is a corrosive and toxic substance. Operators should wear appropriate personal protective equipment, including gloves, goggles, and a lab coat. In a laboratory or industrial setting, it should be handled in a well - ventilated area or under a fume hood to prevent inhalation of its vapors.
For the synthesis of polymers, isophthaloyl dichloride is usually reacted with diamines or diols. The reaction is typically carried out in an organic solvent under controlled temperature and pressure conditions. The ratio of reactants should be carefully controlled according to the stoichiometry of the reaction to ensure the desired polymer structure and properties. After the reaction, the product needs to be purified through methods such as precipitation, filtration, and washing to remove impurities.
Case 1: A textile company was looking for a high - performance fiber for protective clothing. They used isophthaloyl dichloride to synthesize aramid fibers. By carefully controlling the reaction conditions and the ratio of monomers, they were able to produce aramid fibers with excellent mechanical strength and heat resistance. These fibers were then used to make fire - resistant and cut - resistant protective clothing, which was well - received in the market.
Case 2: An electronics company needed a high - performance insulating material for their electronic devices. They used isophthaloyl dichloride to synthesize a special polyester. The polyester had good electrical insulation properties and heat resistance. After optimization of the production process, the polyester was used as an insulating layer in printed circuit boards, improving the reliability and performance of the electronic devices.
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