1,5-Dibromopentane
1,5-Dibromopentane (CAS: 111-24-0), a halogenated hydrocarbon with the molecular formula Br(CH2)5Br and a molecular weight of 229.94 g/mol, serves as a versatile intermediate in organic synthesis. This compound is widely employed as a building block for the preparation of diverse organic molecules, including pharmaceuticals and other fine chemicals. Its difunctional nature allows for the introduction of a five-carbon chain into various chemical structures, facilitating cyclisation reactions or the formation of linear polymers.
- IUPAC
- Pentamethylene dibromide
- Synonyms
- Pentamethylene dibromide1,1-Dibromopentane1,5-Dibromopentane

Organic Synthesis Intermediate
1,5-Dibromopentane is a key reagent for introducing a pentamethylene unit into organic molecules. It is used in alkylation reactions and in the synthesis of heterocyclic compounds through intramolecular cyclisation.
Pharmaceutical Precursor
This dibromoalkane serves as a precursor in the multi-step synthesis of active pharmaceutical ingredients (APIs). Its reactive bromine atoms enable coupling with various nucleophiles to build complex molecular architectures.
Polymer Chemistry
The compound can be utilised in polymerisation reactions, acting as a monomer or cross-linking agent to create specialised polymeric materials.
Research and Development
Widely used in academic and industrial R&D labs, 1,5-Dibromopentane is valuable for exploring novel synthetic routes and developing new chemical entities.
| Molecular weight | 229.94 |
|---|---|
| Linear formula | Br(CH2)5Br |
| Assay | 97% |
| Boiling point | 110 °C/15 mmHg(lit.) |
| Density | 1.688 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.512(lit.) |
| Vapour density | 8 (vs air) |
| Melting point | −34 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 79 °C / 174.2 °F |
| Transport (UN / ADR) | NA 1993 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/38 |
| Safety statements (S) | 23-26-36 |
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 1,5-Dibromopentane used for?
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1,5-Dibromopentane is primarily used as a building block and intermediate in organic synthesis, particularly for introducing a five-carbon chain, in the preparation of pharmaceuticals, and in polymer chemistry.
What is the CAS number and formula for 1,5-Dibromopentane?
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The CAS number for 1,5-Dibromopentane is 111-24-0, and its linear formula is Br(CH2)5Br.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,5-Dibromopentane with a minimum assay of 97%. We do not represent this product as USP, BP, or EP grade; it is suitable for research and general chemical synthesis purposes.
How should 1,5-Dibromopentane be handled safely?
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1,5-Dibromopentane is classified as a Warning substance, causing skin irritation (H315) and serious eye irritation (H319). Appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection, should be used. Handle in a well-ventilated area and avoid contact with skin and eyes.
Is 1,5-Dibromopentane a controlled substance?
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The provided data does not indicate that 1,5-Dibromopentane is a controlled substance.
How is 1,5-Dibromopentane packaged and shipped?
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1,5-Dibromopentane is typically packaged according to industry standards for hazardous materials and can be exported globally by Tech Serve Solutions.
How can I request a quote or sample for 1,5-Dibromopentane?
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To request a quote or sample for 1,5-Dibromopentane, please contact our sales department via the website or by telephone.
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