Bromocyclopentane
Bromocyclopentane (CAS: 137-43-9), with the molecular formula C5H9Br and a molecular weight of 149.03 g/mol, is a halogenated hydrocarbon. It serves as a valuable organic building block in chemical synthesis. This compound is typically supplied with an assay of ≥98%, suitable for research and development purposes, and is not intended for pharmaceutical applications unless explicitly stated.
- IUPAC
- Cyclopentyl bromide
- Synonyms
- Cyclopentyl bromide

Organic Synthesis Intermediate
Bromocyclopentane functions as a versatile intermediate in the synthesis of more complex organic molecules. Its bromide functional group allows for various substitution and coupling reactions.
Building Block for Specialty Chemicals
It is employed as a fundamental building block in the creation of specialty chemicals and novel compounds within research laboratories. The cyclopentyl moiety can be incorporated into diverse molecular structures.
Research and Development
This compound is utilised in academic and industrial research settings for exploring new synthetic pathways and developing innovative chemical entities.
| Molecular weight | 149.03 |
|---|---|
| Empirical formula | C5H9Br |
| Assay | ≥98% |
| Boiling point | 137-139 °C(lit.) |
| Density | 1.39 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.488(lit.) |

Hazard statements
- H226Flammable liquid and vapour
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 42 °C / 107.6 °F |
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Risk statements (R) | 10 |
| Safety statements (S) | 23-24/25 |
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 Bromocyclopentane used for?
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Bromocyclopentane is primarily used as an intermediate in organic synthesis and as a building block for creating specialty chemicals and novel compounds in research and development.
What are the CAS number and formula for Bromocyclopentane?
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The CAS number for Bromocyclopentane is 137-43-9, and its molecular formula is C5H9Br.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bromocyclopentane with a purity of ≥98%. This product is intended for research and laboratory use and is not represented as USP, BP, EP, or other pharmacopoeia grades.
How should Bromocyclopentane be handled safely?
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Bromocyclopentane is a flammable liquid and vapour (H226). Handle with appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection, in a well-ventilated area. Refer to the Safety Data Sheet for comprehensive handling instructions.
How is Bromocyclopentane packed, shipped, and exported?
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Bromocyclopentane is carefully packed in compliance with international shipping regulations for hazardous materials (UN 1993, Class 3, PGIII). Tech Serve Solutions manages global export logistics for this chemical.
How can I request a sample or quote for Bromocyclopentane?
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To request a sample or a quotation for Bromocyclopentane, please contact our sales team through the website or by phone, providing your specific requirements and delivery details.
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