Description

5-Icosyne is a high-purity, long-chain terminal alkyne with the CAS registry number 74685-31-7, serving as a versatile and valuable building block in advanced organic synthesis. Its terminal alkyne functionality makes it a critical reagent for constructing complex molecular architectures via robust coupling reactions like the Sonogashira, Glaser, and Click chemistry. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and materials science industries who require precise, high-quality intermediates for developing new active ingredients and functional polymers.

Application

• Pharmaceutical Intermediate: Used in the synthesis of novel drug candidates, particularly in creating molecular scaffolds for targeted therapies.
• Agrochemical Research: Serves as a key building block for developing new pesticides and herbicides with specific modes of action.
• Polymer & Material Science: Employed in the production of specialty polymers, dendrimers, and advanced materials with tailored properties.
• Click Chemistry: An ideal substrate for copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions to create triazole linkages in bioconjugation and material surface modification.
• Organic Synthesis & Catalysis: Acts as a fundamental reagent in palladium-catalyzed cross-coupling reactions to form carbon-carbon bonds.
• Liquid Crystal & OLED Development: Used in the synthesis of organic semiconductors and liquid crystal materials for electronic displays.

Basic Information

Product Name	5-Icosyne
CAS No.	74685-31-7
Molecular Formula	C₂₀H₃₈
Molecular Weight	278.52 g/mol
Synonyms	1-Nonadecyne; Icos-5-yne; 5-Eicosyne; 5-Ikosin; 5-Eikosin; Nonadec-1-yne (common misnomer); Terminal C20 Alkyne
EINECS	Contact for details

Quality Control

Our 5-Icosyne is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including chromatographic purity analysis and identity confirmation. A detailed Certificate of Analysis (COA) documenting purity, assay, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%

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