Chemical Properties of 1,2,4,5-Benzene-tetracarboxylic acid (CAS 89-05-4)

1,2,4,5-Benzene-tetracarboxylic acid

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InChI Key
Molecular Weight1
Other Names
  • 1,2,4,5-Tetracarboxybenzene
  • Benzene-1,2,4,5-tetracarboxylic acid
  • Pyromellitic acid
  • USAF xr-20

Physical Properties

Property Value Unit Source
Δcsolid -3221.80 ± 0.88 kJ/mol NIST
Δf -946.12 kJ/mol Joback Calculated Property
Δfgas -1106.85 kJ/mol Joback Calculated Property
Δfsolid -1570.80 ± 0.88 kJ/mol NIST
Δfus 37.28 kJ/mol Joback Calculated Property
Δvap 135.82 kJ/mol Joback Calculated Property
logPoct/wat 0.48 Crippen Calculated Property
Pc 6180.53 kPa Joback Calculated Property
Tboil 1054.02 K Joback Calculated Property
Tc 1292.89 K Joback Calculated Property
Tfus 544.15 ± 2.00 K NIST
Vc 0.59 m3/kg-mol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas 443.75 J/mol×K 1054.02 Joback Calculated Property
η 0.00 Pa×s 1054.02 Joback Calculated Property

Molecular Descriptors

Joback and Reid Groups
=C< (ring) 4
-OH (alcohol) 4
>C=O (nonring) 4
=CH- (ring) 2

Similar Compounds

1,2,4-Benzenetricarboxylic acid. 1,2-Benzenedicarboxylic acid, 4-methyl-. Benzenepentacarboxylic acid. BENZENEHEXACARBOXYLIC ACID. Benzoic acid, 2,4,5-trimethyl-. Dimethyl pyromellitate. 1,2,4,5-Benzenetetracarboxylic acid, tetramethyl ester. 1,2,4-Benzenetricarboxylic acid, trimethyl ester. 1,2,3-Benzenetricarboxylic acid. 2,3,4,5-Tetramethylbenzoic acid. 1,2-Benzenedicarboxylic acid, 4-methyl-, dimethyl ester. Benzoic acid, 2,5-dimethyl-. Diethyl pyromellitate. Tetraethylpyromellitate. Pentamethylbenzoic acid.

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