5-Nitroisophthalic acid
5-Nitroisophthalic acid (CAS: 618-88-2), with the molecular formula O2NC6H3-1,3-(CO2H)2 and a molecular weight of 211.13, is a dicarboxylic acid derivative. It serves as a valuable building block in organic synthesis. Its structure, featuring a nitro group and two carboxylic acid functionalities on a benzene ring, allows for diverse chemical transformations, making it useful in the development of novel materials and pharmaceutical intermediates.
- IUPAC
- 5-Nitrobenzene-1,3-dicarboxylic acid
- Synonyms
- 5-Nitrobenzene-1,3-dicarboxylic acid3,5-Dicarboxy-1-nitrobenzene

Organic Synthesis Intermediate
5-Nitroisophthalic acid is a versatile intermediate in organic chemistry. Its reactive functional groups enable its use in various coupling and derivatization reactions for the synthesis of complex organic molecules.
Material Science
The compound can be incorporated into polymers or used in the synthesis of specialized materials. The nitro and carboxylic acid groups offer sites for polymerisation or cross-linking.
Pharmaceutical Research
As a building block, it can be employed in the research and development of new pharmaceutical agents. Its structural features may contribute to the biological activity of target compounds.
| Molecular weight | 211.13 |
|---|---|
| Linear formula | O2NC6H3-1,3-(CO2H)2 |
| Assay | 98% |
| Grade | Vetec™ reagent grade |
| Melting point | 259-261 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Flash point | 120 °C / 248 °F |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 5-Nitroisophthalic acid used for?
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5-Nitroisophthalic acid is primarily used as a building block in organic synthesis, for the development of materials, and in pharmaceutical research.
What are the CAS number and formula for 5-Nitroisophthalic acid?
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The CAS number is 618-88-2, and the linear formula is O2NC6H3-1,3-(CO2H)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Nitroisophthalic acid in Vetec™ reagent grade with an assay of 98%.
How should 5-Nitroisophthalic acid be handled safely?
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5-Nitroisophthalic acid is a warning substance that causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment, avoiding dust formation and ensuring adequate ventilation. Refer to the safety data sheet for comprehensive handling information.
Is 5-Nitroisophthalic acid a controlled substance?
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The provided data does not indicate that 5-Nitroisophthalic acid is a controlled substance.
How is 5-Nitroisophthalic acid packed and exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, handling packing and export in accordance with international regulations.
How can I request a quote or sample for 5-Nitroisophthalic acid?
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Please contact our sales department through our website or by phone to request a quote or a sample of 5-Nitroisophthalic acid.
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