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[Chemical Knowledge]：Properties and Uses of Dioctyl Phthalate

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Dioctyl phthalate (Dioctyl Phthalate, referred to as DOP) is a widely used chemical raw material. It has many important properties and uses, so it plays an important role in plastics, rubber, coatings and other industrial fields.

1. The properties of dioctyl phthalate

1. Physical properties: Dioctyl phthalate is a colorless and transparent oily liquid with a light and elegant smell. It has a density of about 0.986g/cm³, moderate viscosity, high boiling point, good thermal stability and oxidation resistance.
2. Chemical properties: Dioctyl phthalate has high chemical stability and is not easy to hydrolyze, oxidize and decompose. It has good acid resistance, alkali resistance, oil resistance and organic solvent resistance.

2. The use of dioctyl phthalate

1. Plastic plasticizer: As a common plasticizer, dioctyl phthalate is widely used in plastic processing. It can increase the flexibility, ductility and processability of plastics, and reduce the hardness and brittleness of plastics. In polyvinyl chloride (PVC) products, dioctyl phthalate is one of the most commonly used plasticizers, which can make PVC products more soft and durable.
2. Rubber softener: dioctyl phthalate can be used as a softener for rubber to improve the processability and service performance of rubber. It can improve the elasticity, elongation and cold resistance of rubber.
3. Coating additives: Dioctyl phthalate can be used as an additive for coatings to improve the leveling, gloss and adhesion of coatings. It can also improve the weather resistance and aging resistance of the coating.
4. Other uses: In addition to the above uses, dioctyl phthalate can also be used in the production of flavors, solvents, lubricants and other chemical products.

In short, dioctyl phthalate, as an important raw material for chemical production, has been widely used in various fields.

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