Description

5-Undecyne is a terminal alkyne building block of significant importance in advanced organic synthesis. Its linear hydrocarbon chain terminated with a reactive acetylene group makes it a versatile intermediate for constructing more complex molecular architectures. This compound is particularly valuable for researchers and manufacturers in the pharmaceutical, agrochemical, and material science industries who require high-purity, specialized intermediates for coupling reactions and polymer development.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates via Sonogashira, Glaser, and other cross-coupling reactions.
• Agrochemical Synthesis: Used in the research and production of specialized pesticides, herbicides, and plant growth regulators that incorporate alkyne functionalities.
• Material Science & Polymer Chemistry: Acts as a monomer or co-monomer in the development of specialty polymers, dendrimers, and advanced materials with tailored properties.
• Organic Synthesis & Chemical Research: A fundamental reagent for constructing carbon-carbon bonds, used in academic and industrial R&D for creating complex organic molecules, natural product analogs, and molecular probes.
• Liquid Crystal & Electronic Material Precursor: Employed in the synthesis of organic components for liquid crystal displays (LCDs) and organic electronic materials due to its linear structure and reactivity.
• Surface Modification & Click Chemistry: Utilized in bioconjugation and surface functionalization strategies, particularly in Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) "click" reactions.

Basic Information

Product Name	5-Undecyne
CAS No.	2294-72-6
Molecular Formula	C₁₁H₂₀
Molecular Weight	152.28 g/mol
Synonyms	1-Hexyne, 5-ethyl-; 5-Ethyl-1-hexyne; Undec-5-yne; 5-Undecyne; 5-Ethylhex-1-yne; 2294-72-6 (CAS); 5-Undecyne (primary name)
EINECS	218-950-4

Quality Control

Our 5-Undecyne is produced and handled under a strict quality management system to ensure batch-to-batch consistency and high purity for demanding synthetic applications. Each lot is analyzed using advanced chromatographic and spectroscopic techniques (GC, GC-MS, NMR) to confirm identity and quantify purity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with every shipment to support your quality assurance and regulatory documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat, sparks, and open flames. Recommended storage temperature is 2-8°C for long-term stability. Keep away from strong oxidizing agents and strong acids. Containers should be kept tightly sealed when not in use to prevent evaporation and minimize moisture uptake.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Density (at 20°C)	0.76 - 0.78 g/mL
Refractive Index (n20D)	1.430 - 1.435

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.