4-Bromo-2-hydroxybenzoic acid
4-Bromo-2-hydroxybenzoic acid (CAS: 1666-28-0; Formula: C7H5BrO3) is a versatile organic compound with a molecular weight of 217.02 g/mol. Characterised as a brominated salicylic acid derivative, it functions as a key intermediate in organic synthesis. Its structure lends itself to applications in the development of pharmaceuticals, agrochemicals, and various specialised organic materials, making it a valuable building block for chemical research and industrial processes.
- IUPAC
- 4-Bromosalicylic acid
- Synonyms
- 4-Bromosalicylic acid

Pharmaceutical Intermediate
Serves as a crucial building block in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates. Its bromine and hydroxyl functionalities allow for diverse chemical modifications.
Agrochemical Synthesis
Used in the development of novel pesticides, herbicides, and other crop protection agents. The specific substitution pattern can influence biological activity.
Organic Building Block
A valuable reagent in general organic synthesis, enabling the introduction of a brominated salicylic acid moiety into complex molecules.
Material Science
Potentially employed in the synthesis of specialised polymers or functional materials where its specific chemical structure imparts desired properties.
| Molecular weight | 217.02 |
|---|---|
| Empirical formula | C7H5BrO3 |
| Assay | 97% |
| Melting point | 216-217 °C |

Hazard statements
- H301Toxic if swallowed
Precautionary statements
- P301IF SWALLOWED
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-52/53 |
| Safety statements (S) | 61 |
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 4-Bromo-2-hydroxybenzoic acid used for?
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4-Bromo-2-hydroxybenzoic acid is primarily used as an intermediate in organic synthesis, particularly in the development of pharmaceuticals, agrochemicals, and specialised organic materials. It acts as a valuable building block for introducing a brominated salicylic acid structure into more complex molecules.
What are the CAS number and formula for 4-Bromo-2-hydroxybenzoic acid?
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The CAS number for 4-Bromo-2-hydroxybenzoic acid is 1666-28-0, and its molecular formula is C7H5BrO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Bromo-2-hydroxybenzoic acid with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How is 4-Bromo-2-hydroxybenzoic acid handled and stored?
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4-Bromo-2-hydroxybenzoic acid is classified as toxic if swallowed (H301) and harmful to aquatic life with long-lasting effects (H52/53). It requires careful handling in a well-ventilated area, avoiding contact with skin, eyes, and clothing. Refer to the Safety Data Sheet (SDS) for comprehensive safety information and appropriate personal protective equipment (PPE).
Can 4-Bromo-2-hydroxybenzoic acid be exported?
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Yes, Tech Serve Solutions is an experienced global supplier and exporter of fine chemicals, including 4-Bromo-2-hydroxybenzoic acid, adhering to all international shipping regulations.
How can I request a sample or quote for 4-Bromo-2-hydroxybenzoic acid?
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To request a sample or a quote for 4-Bromo-2-hydroxybenzoic acid, please contact our sales team through the website or call us directly. Our team will be happy to assist you with your requirements.
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