Undecane
Undecane (CAS: 1120-21-4), a straight-chain alkane with the formula CH3(CH2)9CH3 and a molecular weight of 156.31 g/mol, is a clear, colourless liquid. It is primarily utilised as a chemical intermediate and building block in organic synthesis. Undecane finds applications in research laboratories and industrial processes where its specific hydrocarbon chain length is advantageous for various chemical reactions and formulations. Its properties make it suitable for use in analytical standards and specialised solvent applications.
- IUPAC
- n-Undecane,Hendecane

Organic Synthesis Intermediate
Undecane serves as a valuable building block in organic synthesis. Its linear hydrocarbon chain can be functionalised or incorporated into larger molecules, contributing to the construction of complex organic structures for various research and industrial purposes.
Laboratory Reagent
As a readily available alkane, undecane functions as a reagent or solvent in research and development laboratories. It is employed in studies requiring specific non-polar media or as a component in analytical procedures and calibration standards.
Specialty Solvent
With its characteristic non-polar nature, undecane can be used as a specialty solvent in applications where specific solvency properties are required. It is suitable for dissolving non-polar compounds and can be used in formulations or extraction processes.
| Molecular weight | 156.31 |
|---|---|
| Linear formula | CH3(CH2)9CH3 |
| Assay | ≥99% |
| Grade | purum |
| Boiling point | 196 °C(lit.) |
| Density | 0.74 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.417(lit.) |
| Melting point | −26 °C(lit.) |
| Vapour pressure | <0.4 mmHg (20 °C) |
| Vapour density | 5.4 (vs air) |

Hazard statements
- H304May be fatal if swallowed and enters airways
Precautionary statements
- P301IF SWALLOWED
- P331Do NOT induce vomiting
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 62 °C / 143.6 °F |
| Transport (UN / ADR) | UN 2330 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 65-66 |
| Safety statements (S) | 62 |
| Supplemental hazards | Repeated exposure may cause skin dryness or cracking. |
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 Undecane used for?
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Undecane is used as a chemical intermediate, a building block in organic synthesis, and a specialty solvent in laboratory and industrial settings.
What are the CAS number and chemical formula for Undecane?
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The CAS number for Undecane is 1120-21-4, and its chemical formula is CH3(CH2)9CH3.
What grade and purity does Tech Serve Solutions supply for Undecane?
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Tech Serve Solutions supplies Undecane with a minimum assay of ≥99% in a 'purum' grade. We do not represent this product as USP, BP, or EP grade.
How should Undecane be handled safely?
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Undecane is classified as a Danger hazard, primarily due to the risk of aspiration if swallowed (H304). It may also cause skin dryness or cracking with repeated exposure. Handle with appropriate personal protective equipment, including eyeshields and chemical-resistant gloves, and ensure good ventilation. Avoid ingestion and prolonged skin contact.
How is Undecane packed, shipped, and exported?
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Undecane is shipped according to international regulations for hazardous materials (UN 2330 3 / PGIII). Tech Serve Solutions offers expert packing and global export services for this chemical.
How can I request a sample or quote for Undecane?
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To request a sample or a quote for Undecane, please contact our sales team through the website or by phone.
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