3-Chloro-2-pentene
3-Chloro-2-pentene (CAS: 34238-52-3), a halogenated hydrocarbon with the molecular formula C5H9Cl and a molecular weight of 104.58 g/mol, is a useful organic building block. This compound, typically supplied at 90% purity, serves as a versatile intermediate in organic synthesis. Its reactivity makes it valuable for creating more complex molecular structures in research and development settings. The density is approximately 0.906 g/mL at 25 °C.

Organic Synthesis Intermediate
3-Chloro-2-pentene is employed as a key building block in the synthesis of various organic compounds. Its structure allows for diverse chemical transformations, facilitating the construction of complex molecules.
Research and Development
This compound is utilised in R&D laboratories for exploring novel chemical pathways and developing new synthetic methodologies. It aids in the study of halogenated alkenes and their reactivity.
Fine Chemical Production
As a halogenated hydrocarbon, 3-Chloro-2-pentene can be used in the production of fine chemicals, where specific structural features are required for the final product.
| Molecular weight | 104.58 |
|---|---|
| Empirical formula | C5H9Cl |
| Assay | 90% |
| Density | 0.906 g/mL at 25 °C |


Hazard statements
- H225Highly flammable liquid and vapour
- H302Harmful if swallowed
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Flash point | -4 °C / 24.8 °F |
|---|---|
| Transport (UN / ADR) | UN 1993BF 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xn |
| Risk statements (R) | 11-22-52 |
| Safety statements (S) | 16 |
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 3-Chloro-2-pentene used for?
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3-Chloro-2-pentene is primarily used as an intermediate in organic synthesis and in research and development for creating new molecules and studying chemical reactions.
What is the CAS number and formula for 3-Chloro-2-pentene?
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The CAS number for 3-Chloro-2-pentene is 34238-52-3, and its empirical formula is C5H9Cl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Chloro-2-pentene with a minimum assay of 90%. TSS does not represent this product as USP, BP, EP, or pharmacopoeia grade.
How should 3-Chloro-2-pentene be handled safely?
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3-Chloro-2-pentene is flammable and harmful if swallowed. It requires careful handling in well-ventilated areas, away from ignition sources, and with appropriate personal protective equipment. Refer to the Safety Data Sheet for detailed handling instructions.
How is 3-Chloro-2-pentene shipped and exported?
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3-Chloro-2-pentene is shipped according to UN 1993 regulations for flammable liquids, packed in PG II containers. TSS offers global export services for this chemical.
How can I request a quote or sample?
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To request a quote or a sample of 3-Chloro-2-pentene, please contact the TSS sales team through our website or by phone, providing your specific requirements.
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