2-Oxooctanoic acid
2-Oxooctanoic acid (CAS: 328-51-8) is an organic compound with the linear formula CH3(CH2)5COCOOH and a molecular weight of 158.19 g/mol. This alpha-keto acid serves as a valuable building block in organic synthesis. Its structure, featuring both a ketone and a carboxylic acid group, allows for diverse chemical transformations. It is commonly utilised in research and development laboratories for the synthesis of more complex molecules and speciality chemicals.
- IUPAC
- α-Ketooctanoic acid,2-Oxocaprylic acid
- Synonyms
- α-Ketooctanoic acid2-Oxocaprylic acid

Organic Synthesis
2-Oxooctanoic acid is a versatile building block used in the synthesis of various organic compounds. Its keto and carboxylic acid functionalities enable participation in a wide range of chemical reactions.
Chemical Research
Utilised in academic and industrial research settings for exploring novel synthetic pathways and developing new chemical entities. Its specific structure makes it useful for studying reaction mechanisms.
Intermediate for Speciality Chemicals
Serves as an intermediate in the production of speciality chemicals. The compound's reactive groups allow for its incorporation into larger, more complex molecular structures.
| Molecular weight | 158.19 |
|---|---|
| Linear formula | CH3(CH2)5COCOOH |
| Assay | ≥99.0% (T) |
| Boiling point | 82 °C/0.05 mmHg |
| Storage temperature | 2-8°C |
| Melting point | 33-36 °C |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26 |
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 2-Oxooctanoic acid used for?
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2-Oxooctanoic acid is primarily used as a building block in organic synthesis and in chemical research for developing new synthetic pathways and molecules.
What is the CAS number and formula for 2-Oxooctanoic acid?
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The CAS number for 2-Oxooctanoic acid is 328-51-8, and its linear formula is CH3(CH2)5COCOOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Oxooctanoic acid with an assay of ≥99.0% (T). We do not represent this product as USP, BP, EP, or other pharmacopoeia grades.
How should 2-Oxooctanoic acid be handled and stored?
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2-Oxooctanoic acid is a warning substance (H302-H315-H319-H335) and should be handled with appropriate personal protective equipment including a dust mask (N95), eyeshields, and gloves. It should be stored at 2-8°C.
How is 2-Oxooctanoic acid shipped and exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals and can arrange for the shipment and export of 2-Oxooctanoic acid according to international regulations.
How can I request a sample or quote for 2-Oxooctanoic acid?
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To request a sample or a quote for 2-Oxooctanoic acid, please contact our sales team through the TSS website or by phone.
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