Description
Chemical Name:Pyromellitic acid
Cas No:89-05-4
EINECS No:201-879-5
Synonyms:1,2,4,5-Benzenetetracarboxylic acid, 96% 100GR;1,2,4,5-BENZENETETRACARBOXYLIC ACID FOR;Pyrome1htic Acid;AKOS AUF2102;BUFFER SOLUTION, PH 7.7;BENZENE-1,2,4,5-TETRACARBOXYLIC ACID HYDRATE
Molecular Weight:254.15
Molecular Formula:C10H6O8
Molecular Structure:
Specification:
Items | Specifications |
Cas No. | 89-05-4 |
EINECS | 201-879-5 |
Molecular Weight | 254.15 |
Appearance | White to light yellow Crystalline Powder |
Density | 0,56 g/cm3 |
pKa | pK1: 1.92;pK2: 2.87;pK3: 4.49;pK4: 5.63 (25°C) |
Water solublity | 1.5 g/100 mL (20 ºC) |
Fp | 325 °C |
Melting Point | 281-284.5 °C(lit.) |
PH | / |
Boiling point | 317.36°C (rough estimate) |
Function:
Pyromellitic acid is a polyacid with strong acidity. Its four carboxyl groups (-COOH) can ionize hydrogen ions (H⁺) in the solution, which can react with alkali to adjust the pH of the solution. This acidity also allows it to act as a proton donor in some chemical reactions, promoting the reaction of other compounds.
The carboxyl group in the pyromellitic acid molecule can act as a coordinating group to form a complex with metal ions. It can combine with a variety of metal ions (such as transition metal ions) through coordination bonds to form stable metal-organic complexes.
Application:
High-performance coatings and adhesives: In the preparation of coatings and adhesives, pyromellitic acid can be used to synthesize polyester resins.
Electronic packaging materials: In the field of electronic packaging, pyromellitic acid can be used to synthesize high-performance packaging materials. The polymer materials generated by its reaction with compounds such as epoxy resin have good insulation, heat resistance and mechanical properties, which can effectively protect electronic components from the influence of the external environment and improve the reliability and service life of electronic products.
Water treatment: In the process of water treatment, pyromellitic acid can be used as a chelating agent to remove heavy metal ions in water. The complex formed by it and heavy metal ions can be separated from water by precipitation or filtration, thereby purifying the water quality.
