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Dioctyl Phthalate (DOP)
- 产地
- : China, Taiwan
- CAS 编号
- : 117-81-7
- HS 代码
- : 291732
基本信息
- IUPAC Name
- : bis(2-ethylhexyl) benzene-1,2-dicarboxylate
- Molecular Formula
- : C24H38O4
- Molecular Weight (g/mol)
- : 390.5700
- Synonyms & Trade Names
- : Dioctyl phthalate; DOP; DEHP; Bis(2-ethylhexyl) phthalate
- Purity / Assay (%)
- : 99% min
- Grade / Quality Level
- : Technical Grade
- Physical Form
- : Liquid
- Concentration
- : Pure substance
- Appearance / Color
- : Clear to slightly colored liquid
- Odor
- : Mild
- Melting Point (°C)
- : -55.0000
- Boiling Point (°C)
- : 370
- Density (g/cm³)
- : 0.9840
- Solubility in Water
- : Insoluble in water
- Signal Word
- : Warning
- GHS Hazard Class
- : Reproductive hazard; Aquatic hazard
- H-Statements
- : H360D|H400|H410
- P-Statements
- : P201|P202|P260|P273|P280|P308+P313
- REACH Status
- : Registered (SVHC)
- Drug Precursor Status
- : Non-precursor
- Storage Class (GHS)
- : 10
- Storage Conditions
- : Cool, dry place; avoid contact with eyes
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Brief Overview
Dioctyl phthalate (DOP) is a colorless, odorless, and oily liquid organic compound that belongs to the phthalate family. It is one of the most commonly used plasticizers and is particularly well-suited for use in polyvinyl chloride (PVC) products. DOP is also known for its low volatility and resistance to high temperatures, which makes it useful in applications such as cable insulation, automotive parts, and medical devices.
Manufacturing Process
Synthesis of Phthalic Anhydride: The first step in the manufacturing of DOP involves the synthesis of phthalic anhydride. Phthalic anhydride is produced by the oxidation of naphthalene or o-xylene with air.
Esterification: In the next step, phthalic anhydride is esterified with 2-ethylhexanol (2-EH) to produce dioctyl phthalate. This reaction is catalyzed by an acid catalyst, typically sulfuric acid.
Purification: The resulting mixture of DOP and unreacted 2-EH is then purified by fractional distillation to separate the DOP from the 2-EH. The DOP is typically obtained as a clear, colorless liquid with a boiling point of around 385°C.