5-Chloro-2-pentanone
5-Chloro-2-pentanone (CAS: 5891-21-4), with the linear formula Cl(CH2)3COCH3 and a molecular weight of 120.58 g/mol, is a versatile chemical intermediate. This ketone compound serves as a valuable building block in organic synthesis. It is commonly utilised in the chemical industry for the preparation of more complex molecules and specialised organic compounds, playing a role in various chemical manufacturing processes.
- IUPAC
- Methyl 3-chloropropyl ketone
- Synonyms
- Methyl 3-chloropropyl ketone

Organic Synthesis Intermediate
5-Chloro-2-pentanone is a key intermediate in the synthesis of various organic compounds. Its bifunctional nature, with both a ketone and an alkyl chloride moiety, allows for diverse chemical transformations.
Building Block for Heterocycles
The compound can be employed in the construction of heterocyclic ring systems, which are prevalent in pharmaceuticals and agrochemicals. Its structure facilitates cyclisation reactions.
Precursor in Specialty Chemicals
It serves as a precursor for the development of specialty chemicals, where specific functional groups are introduced through subsequent reactions. This includes its use in creating more complex ketones or substituted alkanes.
| Molecular weight | 120.58 |
|---|---|
| Linear formula | Cl(CH2)3COCH3 |
| Assay | 85% |
| Grade | technical grade |
| Boiling point | 71-72 °C/20 mmHg(lit.) |
| Density | 1.057 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.438(lit.) |
| Impurities tested | 1-2% water |
| Protective equipment | Eyeshields, Gloves, half-mask respirator (EU), half-mask respirator (US), multi-purpose combination respirator cartridge (US) |
|---|---|
| Flash point | 67 °C / 152.6 °F |
| Transport (UN / ADR) | UN 1224C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
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 5-Chloro-2-pentanone used for?
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5-Chloro-2-pentanone (CAS: 5891-21-4) is primarily used as a building block and intermediate in organic synthesis for creating more complex molecules, including heterocyclic compounds and specialty chemicals.
What are the CAS number and chemical formula for 5-Chloro-2-pentanone?
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The CAS number is 5891-21-4, and its linear formula is Cl(CH2)3COCH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Chloro-2-pentanone as a technical grade material with an assay of 85%, containing 1-2% water as an impurity. This product is not represented as USP, BP, or EP grade.
How should 5-Chloro-2-pentanone be handled safely?
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5-Chloro-2-pentanone is a flammable liquid and vapour (Flash Point 67°C / 152.6°F). It can cause skin and eye irritation. Appropriate personal protective equipment, including eyeshields and gloves, is recommended. Handle in a well-ventilated area and consult the Safety Data Sheet for full details. It is classified under UN 1224C 3 / PGIII.
How is 5-Chloro-2-pentanone packed, shipped, and exported?
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Tech Serve Solutions expertly handles the packing, shipping, and global export of 5-Chloro-2-pentanone, adhering to all relevant regulations for chemical transport.
How can I request a quote or sample of 5-Chloro-2-pentanone?
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To request a quote or a sample of 5-Chloro-2-pentanone, please contact our sales team through the website or by phone, providing your specific requirements.
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