Bromocyclopropane
Bromocyclopropane (CAS: 4333-56-6, Formula: C3H5Br, MW: 120.98) is a halogenated hydrocarbon and a valuable organic building block. Possessing a cyclopropyl group bonded to a bromine atom, this compound serves as a reactive intermediate in various organic synthesis pathways. Its primary utility lies in facilitating the introduction of the cyclopropyl moiety into more complex molecular structures, crucial in the development of novel compounds for research and industrial applications.
- IUPAC
- Cyclopropyl bromide
- Synonyms
- Cyclopropyl bromide

Organic Synthesis Intermediate
Bromocyclopropane is a key reagent for introducing the cyclopropyl group into organic molecules. It is widely used in academic and industrial research for the synthesis of complex organic compounds and pharmaceutical intermediates.
Building Block in Medicinal Chemistry
The cyclopropyl ring is a common structural motif in many biologically active compounds. Bromocyclopropane serves as an accessible building block for synthesizing novel drug candidates containing this important feature.
Material Science Research
This compound can be employed in the development of novel materials where the cyclopropyl structure imparts specific physical or chemical properties. Its reactivity allows for incorporation into polymer backbones or functionalisation of material surfaces.
| Molecular weight | 120.98 |
|---|---|
| Empirical formula | C3H5Br |
| Assay | 99% |
| Boiling point | 69 °C(lit.) |
| Density | 1.51 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.458(lit.) |
| Storage temperature | 2-8°C |


Hazard statements
- H225Highly flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | -6 °C / 21.2 °F |
| Transport (UN / ADR) | UN 1993BE 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xi |
| Risk statements (R) | 11-36/37/38 |
| Safety statements (S) | 16-26-36 |
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 Bromocyclopropane used for?
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Bromocyclopropane is primarily used as a reactive intermediate and building block in organic synthesis, particularly for introducing the cyclopropyl moiety into more complex molecules relevant to medicinal chemistry and material science research.
What is the CAS number and formula for Bromocyclopropane?
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The CAS number for Bromocyclopropane is 4333-56-6, and its molecular formula is C3H5Br.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bromocyclopropane with an assay of 99%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade; it is intended for research and industrial use.
How should Bromocyclopropane be handled safely?
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Bromocyclopropane is a highly flammable liquid and vapour (H225) and causes skin (H315), eye (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area, away from ignition sources.
How is Bromocyclopropane packed and shipped?
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Bromocyclopropane is packed and shipped in accordance with relevant regulations for flammable liquids, classified under UN 1993, UN Class 3, Packing Group II. TSS offers global export services.
How can I request a sample or quote for Bromocyclopropane?
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To request a sample or a quote for Bromocyclopropane, please contact the Tech Serve Solutions sales team via our website or direct email, providing your specific requirements.
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