5-Bromophthalide
5-Bromophthalide (CAS: 64169-34-2; Formula: C8H5BrO2; MW: 213.03 g/mol) is a halogenated heterocyclic building block. This organic compound is utilised in chemical synthesis, primarily as an intermediate for the preparation of more complex molecules in research and development settings. Its specific structure lends itself to various functionalisation reactions within organic chemistry.
- IUPAC
- 5-Bromo-3H-isobenzofuranone
- Synonyms
- 5-Bromo-3H-isobenzofuranone

Chemical Synthesis Intermediate
Serves as a key building block in the synthesis of novel organic compounds. Its bromine atom and phthalide structure allow for diverse chemical transformations in multi-step synthetic routes.
Research and Development
Employed in academic and industrial laboratories for exploring new chemical entities and reaction pathways. Its utility lies in its potential as a precursor for pharmaceuticals, agrochemicals, or materials science.
Heterocyclic Chemistry
A valuable component in the study and construction of heterocyclic frameworks. The benzofuran motif is prevalent in many biologically active molecules, making this a useful starting material.
| Molecular weight | 213.03 |
|---|---|
| Empirical formula | C8H5BrO2 |
| Assay | 97% |
| Melting point | 162-166 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 2 |
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-Bromophthalide used for?
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5-Bromophthalide is primarily used as a chemical synthesis intermediate and building block, particularly in research and development for creating complex organic molecules and exploring heterocyclic chemistry.
What is the CAS number and formula for 5-Bromophthalide?
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The CAS number for 5-Bromophthalide is 64169-34-2, and its molecular formula is C8H5BrO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Bromophthalide with an assay of 97%. This product is not classified as USP, BP, or EP grade and is intended for technical and research purposes.
What are the safety and handling precautions for 5-Bromophthalide?
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5-Bromophthalide requires careful handling. Recommended personal protective equipment includes eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is advised for respiratory protection. It is classified as WGK 2 in Germany.
How is 5-Bromophthalide packed and shipped?
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5-Bromophthalide is securely packed to meet international shipping standards and is exported globally by Tech Serve Solutions.
How can I request a quote or sample for 5-Bromophthalide?
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To request a quote or sample of 5-Bromophthalide, please use the contact form or email our sales department via the website.
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