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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
pka pK1: 1.92;pK2: 2.87;pK3: 4.49;pK4: 5.63 (25°C)
form  Crystalline Powder
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.
LogP 0.15 at 25℃
CAS DataBase Reference 89-05-4(CAS DataBase Reference)
NIST Chemistry Reference 1,2,4,5-Benzene-tetracarboxylic acid(89-05-4)
EPA Substance Registry System 1,2,4,5-Benzenetetracarboxylic acid (89-05-4)

Safety Information

Hazard Codes  Xi
Risk Statements  36/37/38-36
Safety Statements  26-36-37/39-24/25
WGK Germany  3
RTECS  DB9275000
HS Code  29173980


Usage And Synthesis

Preparation Products And Raw materials

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