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Pyromellitic acid

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Pyromellitic acid Basic information
Pyromellitic acid Chemical Properties
  • Melting point:281-284.5 °C(lit.)
  • Boiling point:317.36°C (rough estimate)
  • Density 0,56 g/cm3
  • refractive index 1.7010 (estimate)
  • Flash point:325 °C
  • storage temp. Store below +30°C.
  • solubility 0.1 M NaOH: 0.2 M, clear, faintly yellow
  • form Crystalline Powder
  • pkapK1: 1.92;pK2: 2.87;pK3: 4.49;pK4: 5.63 (25°C)
  • color White to very slightly yellow
  • Water Solubility 1.5 g/100 mL (20 ºC)
  • Merck 14,8004
  • Stability:Stable. Incompatible with strong oxidizing agents, strong bases.
  • InChIKeyCYIDZMCFTVVTJO-UHFFFAOYSA-N
  • CAS DataBase Reference89-05-4(CAS DataBase Reference)
  • NIST Chemistry Reference1,2,4,5-Benzene-tetracarboxylic acid(89-05-4)
  • EPA Substance Registry System1,2,4,5-Benzenetetracarboxylic acid (89-05-4)
Safety Information
MSDS
Pyromellitic acid Usage And Synthesis
  • Chemical PropertiesWhite powder. Absorbs moisture slowly if exposed to atmosphere. Soluble in alcohol, slightly soluble in water.
  • UsesPyromellitic acid (PMA) is mainly used as intermediate for powder coating. Product Data Sheet
  • Uses1,2,4,5-benzenetetracarboxylic acid is used for the synthesis of the polyimide, pyromellitic octyl, etc., it is the main raw material of matting curing agent.
  • DefinitionChEBI: A tetracarboxylic acid that is benzene substituted by four carboxy groups at positions 1, 2, 4 and 5 respectively.
  • HazardSkin irritant, may be carcinogenic.
  • Purification MethodsDissolve it in 5.7 parts of hot dimethylformamide, decolorise, filter and cool. The precipitate is collected and dried in air. The solvent is removed by heating in an oven at 150-170o for several hours. It also crystallises from water. [Beilstein 9 H 997, 9 IV 3804.]
Pyromellitic acid Preparation Products And Raw materials
Pyromellitic acid(89-05-4)Related Product Information
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