Homophthalic acid
Homophthalic acid (CAS: 89-51-0) is a dicarboxylic acid with the molecular formula C9H8O4 and a molecular weight of 180.16 g/mol. It is a versatile organic building block used in chemical synthesis. Available from Tech Serve Solutions in a purum grade with an assay of 98%, it serves as a key intermediate in various synthetic pathways within the fine chemical and pharmaceutical industries.
- IUPAC
- α-Carboxy-o-toluic acid,2-Carboxyphenylacetic acid

Organic Synthesis Intermediate
Homophthalic acid serves as a crucial intermediate in the synthesis of more complex organic molecules. Its difunctional nature allows for various derivatizations, making it valuable in constructing heterocyclic compounds and other advanced structures.
Pharmaceutical Building Block
This compound is utilised as a building block in the development of pharmaceutical intermediates and active pharmaceutical ingredients (APIs). Its structural features can be incorporated into molecules with potential therapeutic applications.
Research and Development
In research laboratories, homophthalic acid is employed in exploratory synthesis and methodology development. Its availability enables chemists to investigate novel reaction pathways and discover new chemical entities.
| Molecular weight | 180.16 |
|---|---|
| Linear formula | HO2CCH2C6H4CO2H |
| Assay | 98% |
| Grade | purum |
| Melting point | 178-182 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| 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 Homophthalic acid used for?
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Homophthalic acid is primarily used as an intermediate in organic synthesis, particularly in the pharmaceutical and fine chemical industries, and for research and development purposes.
What is the CAS number and formula for Homophthalic acid?
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The CAS number for Homophthalic acid is 89-51-0 and its molecular formula is C9H8O4 (linear formula: HO2CCH2C6H4CO2H).
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Homophthalic acid in a purum grade with an assay of 98%.
How should Homophthalic acid be handled safely?
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When handling Homophthalic acid, it is essential to wear eyeshields and gloves. A respirator filter of type N95 (US) or P1 (EN143) should be used if airborne exposure is possible. Refer to the safety data sheet for comprehensive guidance.
Does Tech Serve Solutions export Homophthalic acid?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Homophthalic acid.
How can I request a quote or sample for Homophthalic acid?
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To request a quote or sample of Homophthalic acid, please contact the Tech Serve Solutions sales team through our website or by phone.
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