Description

2,9-Undecadiyne is a high-purity, linear diacetylene compound with the CAS number 1785-53-1. This specialty alkyne serves as a critical building block in advanced organic synthesis, enabling the construction of complex molecular architectures. It is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and materials science sectors 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 and active pharmaceutical ingredients (APIs) via cross-coupling and cycloaddition reactions.
• Agrochemical Synthesis: Serves as a key precursor for creating new herbicides, fungicides, and plant growth regulators with tailored properties.
• Material Science Research: A fundamental monomer for developing conjugated polymers, organic semiconductors, and advanced carbon-based nanomaterials.
• Chemical Synthesis: Acts as a versatile diyne component in Click Chemistry (e.g., Copper-Catalyzed Azide-Alkyne Cycloaddition) and other modular synthesis platforms.
• Liquid Crystal & OLED Development: Employed in the research and production of organic light-emitting diodes (OLEDs) and liquid crystal display (LCD) materials.
• Academic & Industrial R&D: A valuable reagent for universities and corporate R&D labs exploring new synthetic methodologies and molecular structures.

Basic Information

Product Name	2,9-Undecadiyne
CAS No.	1785-53-1
Molecular Formula	C₁₁H₁₆
Molecular Weight	148.24 g/mol
Synonyms	Undeca-2,9-diyne; 2,9-Undecadiyne; 1,8-Nonadiyne, 3-methyl-; 3-Methyl-1,8-nonadiyne
EINECS	Contact for details

Quality Control

Every batch of 2,9-Undecadiyne is produced and tested under a strict quality management system. We ensure high chemical purity and consistency through advanced analytical techniques including Gas Chromatography (GC) and Nuclear Magnetic Resonance (NMR) spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and physical parameters is provided with each shipment to guarantee it meets your specific research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area at room temperature (15-25°C/59-77°F). Due to its highly volatile nature, ensure containers are securely sealed and stored upright away from heat sources and open flames. Keep under an inert atmosphere such as nitrogen or argon for long-term storage to maintain stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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