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CAS 593-84-0: The Synthesis, Properties and Applications of Bis(2-ethylhexyl) Phthalate
Abstract
Bis(2-ethylhexyl) phthalate, also known as DEHP, is a widely used plasticizer in the industrial production of polyvinyl chloride (PVC). This report presents a comprehensive overview of DEHP, including its synthesis, physical and chemical properties, and various applications. The synthesis of DEHP is relatively simple, which involves the reaction of phthalic anhydride and 2-ethylhexanol in an inert atmosphere. This compound is a colorless, odorless, viscous liquid with a molecular formula of C24H38O4, an insoluble density of 1.02 g/cm3, and a boiling point of 345°C. DEHP is highly soluble in many organic solvents, such as acetone, ethanol, and ethyl acetate. Due to its low cost and good compatibility with PVC, DEHP is widely used in the manufacture of PVC products, such as flooring, upholstery, and medical devices. However, recent studies have shown that DEHP can be toxic to humans and animals, leading to health concerns in recent years. Therefore, it is important to explore alternatives to DEHP in order to reduce its potential health risks.
Keywords: Bis(2-ethylhexyl) phthalate, DEHP, PVC, plasticizer, synthesis
1. Introduction
Bis(2-ethylhexyl) phthalate (DEHP) is a common plasticizer used in the production of polyvinyl chloride (PVC) products. It is a colorless, odorless liquid with a molecular formula of C24H38O4 and an insoluble density of 1.02 g/cm3. DEHP is highly soluble in many organic solvents, such as acetone, ethanol, and ethyl acetate. DEHP has a boiling point of 345°C and is relatively stable under normal temperatures and pressures. Due to its low cost and good compatibility with PVC, DEHP is widely used in the manufacture of PVC products, such as flooring, upholstery, and medical devices. However, recent studies have shown that DEHP can be toxic to humans and animals, leading to health concerns in recent years. Therefore, it is important to explore alternatives to DEHP in order to reduce its potential health risks.
2. Synthesis
The synthesis of DEHP is relatively simple and involves the reaction of phthalic anhydride and 2-ethylhexanol in an inert atmosphere. The reaction is typically carried out at a temperature of 100-140°C, with a reaction time of 1-2 hours. The reaction is exothermic and the yield of the product is typically 95-98%.
3. Properties
DEHP is a colorless, odorless, viscous liquid with a molecular formula of C24H38O4, an insoluble density of 1.02 g/cm3, and a boiling point of 345°C. DEHP is highly soluble in many organic solvents, such as acetone, ethanol, and ethyl acetate. It is also miscible with many other organic compounds. DEHP is relatively stable under normal temperatures and pressures.
4. Applications
Due to its low cost and good compatibility with PVC, DEHP is widely used in the manufacture of PVC products, such as flooring, upholstery, and medical devices. DEHP is also used as a plasticizer in adhesives, paints, and coatings. In addition, DEHP can be used as an additive in lubricants, fuels, and other industrial products.
5. Health Concerns
Recent studies have shown that DEHP can be toxic to humans and animals, leading to health concerns in recent years. Exposure to DEHP can cause reproductive and developmental problems, as well as other health issues. Therefore, it is important to explore alternatives to DEHP in order to reduce its potential health risks.
6. Conclusion
In conclusion, DEHP is a widely used plasticizer in the industrial production of polyvinyl chloride (PVC). This report presented a comprehensive overview of DEHP, including its synthesis, physical and chemical properties, and various applications. Despite its benefits, DEHP has been linked to health concerns in recent years. Therefore, it is important to explore alternatives to DEHP in order to reduce its potential health risks.