对苯二甲酸

与乙二醇共同用于制造 PET 的芳香族二元羧酸。

化学式
C8H6O4
官能团
Two carboxylic acid groups
摩尔质量
166.13 g/mol
Also known as
benzene-1,4-dicarboxylic acid, TPA, PTA

概览

苯-1,4-二甲酸

两个羧基使其能够与二元醇连接，形成聚酯链。对二甲苯氧化可得到这种 1,4-位二元羧酸。若改与 1,4-丁二醇反应，则形成 PBT，说明同一芳香族原料可以形成不同的聚酯重复单元。

Identifiers

化学式
C8H6O4
官能团
Two carboxylic acid groups
摩尔质量
166.13 g/mol
Also known as
benzene-1,4-dicarboxylic acid, TPA, PTA
化学标识符
SMILES
O=C(O)c1ccc(C(=O)O)cc1
InChI
InChI=1S/C8H6O4/c9-7(10)5-1-2-6(4-3-5)8(11)12/h1-4H,(H,9,10)(H,11,12)
PubChem CID
7489

性质

熔点
427 °C (sealed tube)
升华
greater than 572 °F at 760 mmHg (sublimes without melting) (NTP, 1992)
相对密度（水 = 1）
Specific gravity = 1.522 at 25 °C
水中溶解度
In water, 15 mg/L at 20 °C

Related compounds

参考文献

  1. Polyesters: manufacture and usesChemical Industry Education Centre, University of York
  2. Purified terephthalic acid: products and manufacturing, annual report 2023, page 94INEOS Quattro
  3. PubChem: Terephthalic acidNational Center for Biotechnology Information

    Identity retrieved 2026-09-08; matched against the record's isomeric structure. Unspecified stereochemistry remains unspecified.

  4. Hazardous Substances Data Bank (HSDB): Terephthalic acid — melting pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/7489#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Park CM, Sheehan RJ; Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2011). New York, NY: John Wiley & Sons; Phthalic Acids and Other Benzenepolycarboxylic Acids. Online Posting Date: Dec 4, 2000

  5. CAMEO Chemicals: Terephthalic acid — boiling pointCAMEO Chemicals

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/7489#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.

  6. Hazardous Substances Data Bank (HSDB): Terephthalic acid — densityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/7489#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Park CM, Sheehan RJ; Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2011). New York, NY: John Wiley & Sons; Phthalic Acids and Other Benzenepolycarboxylic Acids. Online Posting Date: Dec 4, 2000

  7. Hazardous Substances Data Bank (HSDB): Terephthalic acid — solubilityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/7489#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Yalkowsky, S.H., He, Yan, Jain, P. Handbook of Aqueous Solubility Data Second Edition. CRC Press, Boca Raton, FL 2010, p. 459