10-Undecenoic acid
10-Undecenoic acid (CAS: 112-38-9) is a monounsaturated fatty acid with the linear formula CH₂=CH(CH₂)₈COOH and a molecular weight of 184.28 g/mol. This compound is a key building block in organic synthesis, particularly useful for creating molecular monolayers on silicon surfaces. It also serves as a starting material for synthesizing insect pheromones relevant to agricultural applications. Tech Serve Solutions offers this high-purity chemical for research and synthesis.
- IUPAC
- Undecylenic acid
- Synonyms
- Undecylenic acid10-Undecylenic acidUndec-10-enoic acid11-Undecenoic acid

Surface Monolayer Studies
10-Undecenoic acid has been employed in research to investigate methods and mechanisms for forming molecular monolayers on silicon surfaces, contributing to materials science advancements.
Synthesis of Insect Pheromones
This compound acts as a crucial starting reagent in the synthesis of agriculturally important insect pheromones, such as (11Z)-hexadecenal, aiding in pest management strategies.
Organic Synthesis Building Block
As a versatile C11 building block, 10-Undecenoic acid is valuable in various organic synthesis pathways for creating complex molecules.
| Molecular weight | 184.28 |
|---|---|
| Linear formula | CH2=CH(CH2)8COOH |
| Assay | 98-100.5% |
| Boiling point | 137 °C/2 mmHg(lit.) |
| Density | 0.912 g/mL at 25 °C(lit.) |
| Refractive index | n25/D 1.447-1.448n20/D 1.449(lit.) |
| Solubility | water: insoluble |
| Melting point | 23-25 °C(lit.) |
| Impurities tested | fats, mineral oils, compliesin water soluble matter, compliesresidual solvents, complies≤0.001% heavy metals (as Pb) |
| Application | 10-Undecenoic acid has been used to study the methods and mechanisms for the formation of molecular monolayers on silicon surface1. It was used as starting reagent in the syntheses of pheromone (11Z)-hexadecenal and agriculturally important insect pheromones2. |
| Suitability | corresponds for degree of unsaturation |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
- H412Harmful to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 149 °C / 300.2 °F |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38-52/53 |
| Safety statements (S) | 26-61 |
| Ignition residue | ≤0.1% (as SO4) |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 42650 |
|---|---|
| Transition Temp | solidification point ≥21 °C |
| Iodine Value | 131‑138 |
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 10-Undecenoic acid primarily used for?
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10-Undecenoic acid is used in studies of molecular monolayer formation on silicon surfaces and as a starting material for synthesizing insect pheromones.
What are the CAS number and linear formula for 10-Undecenoic acid?
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The CAS number is 112-38-9, and the linear formula is CH₂=CH(CH₂)₈COOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 10-Undecenoic acid with an assay of 98-100.5%. We do not represent this product as USP, BP, EP, or pharmacopoeia grade unless explicitly stated in the specifications. It is suitable for degree of unsaturation.
How should 10-Undecenoic acid be handled safely?
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10-Undecenoic acid is a Warning substance that causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). It is also harmful to aquatic life with long-lasting effects (H412). Appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, should be used. Ensure good ventilation and avoid release into the environment.
How is 10-Undecenoic acid packed and exported?
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Tech Serve Solutions professionally packs and exports chemicals globally, adhering to all necessary regulations for safe transport.
How can I request a sample or quote for 10-Undecenoic acid?
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Please contact our sales team directly through our website or by phone to request a sample or a detailed quote for 10-Undecenoic acid.
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