1,2,4,5-Benzenetetracarboxylic acid
1,2,4,5-Benzenetetracarboxylic acid (CAS 89-05-4), also known as pyromellitic acid, is an aromatic organic compound with the formula C6H2(CO2H)4. This white crystalline solid has a molecular weight of 254.15 g/mol. It serves as a crucial building block in organic synthesis and is particularly valued for its role in the production of polymers, resins, and cross-linking agents.
- IUPAC
- Pyromellitic acid
- Synonyms
- Pyromellitic acid5-Benzenetetracarboxylic acidC6H2(CO2H)4

Polymer Synthesis
1,2,4,5-Benzenetetracarboxylic acid is a key monomer in the synthesis of polyimides and polyesters. These high-performance polymers are known for their thermal stability and mechanical strength, finding use in demanding applications.
Cross-linking Agent
Due to its four carboxylic acid groups, this compound acts as an effective cross-linking agent. It can be used to create three-dimensional polymer networks, enhancing the properties of resins and coatings.
Organic Synthesis Intermediate
As a versatile building block, it is employed in the synthesis of various complex organic molecules. Its structure allows for diverse chemical modifications, making it valuable in research and development.
| Molecular weight | 254.15 |
|---|---|
| Linear formula | C6H2(CO2H)4 |
| Assay | 96% |
| Melting point | 281-284.5 °C(lit.) |
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | 325 °C / 617 °F |
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1,2,4,5-Benzenetetracarboxylic acid used for?
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1,2,4,5-Benzenetetracarboxylic acid is primarily used as a building block in organic synthesis, particularly for producing polymers like polyimides, and as a cross-linking agent for resins and coatings.
What is the CAS number and formula for 1,2,4,5-Benzenetetracarboxylic acid?
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The CAS number is 89-05-4 and the molecular formula is C6H2(CO2H)4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,2,4,5-Benzenetetracarboxylic acid with an assay of 96%. This product is supplied for research and laboratory use and is not represented as USP, BP, EP, or any other pharmacopoeia grade.
How should 1,2,4,5-Benzenetetracarboxylic acid be handled?
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Handle 1,2,4,5-Benzenetetracarboxylic acid with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves. It is combustible with a high flash point (325 °C).
Is 1,2,4,5-Benzenetetracarboxylic acid a controlled substance?
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Based on the provided data, 1,2,4,5-Benzenetetracarboxylic acid (CAS 89-05-4) is not indicated as a controlled substance.
How is 1,2,4,5-Benzenetetracarboxylic acid packed and shipped?
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Tech Serve Solutions exports fine chemicals globally. Specific packaging and shipping details are confirmed at the time of order to comply with all regulations.
How can I request a quote or sample?
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To request a quote or sample of 1,2,4,5-Benzenetetracarboxylic acid, please use the contact form on our website or reach out to our sales team directly.
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