Description

(E)-5-Undecen-3-Yne is a high-purity, unsaturated hydrocarbon building block characterized by its unique combination of an alkene and an alkyne functional group. This molecular structure makes it a valuable intermediate for advanced organic synthesis, particularly in the development of specialty chemicals and complex molecules. It is primarily sought after by R&D chemists and process engineers in the pharmaceutical, agrochemical, and fragrance industries for applications requiring precise carbon chain elongation and functionalization.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the synthesis of novel active pharmaceutical ingredients (APIs) and complex organic molecules.
• Agrochemical Synthesis: Used in the research and development of new pesticides, herbicides, and plant growth regulators.
• Fragrance & Flavor Chemistry: Acts as a precursor for synthesizing specific aroma compounds and flavoring agents.
• Material Science Research: Employed in the creation of novel polymers, liquid crystals, or organic electronic materials.
• Cross-Coupling Reactions: A valuable substrate in Sonogashira, Heck, and other palladium-catalyzed coupling reactions.
• Academic & Industrial R&D: Used in exploratory chemistry for constructing complex molecular architectures in research laboratories.

Basic Information

Product Name	(E)-5-Undecen-3-Yne
CAS No.	74744-31-3
Molecular Formula	C₁₁H₁₈
Molecular Weight	150.26 g/mol
Synonyms	(E)-5-Undecen-3-yne; 5-Undecen-3-yne, (E)-; trans-5-Undecen-3-yne; 5-Undecen-3-yne; Undec-5-en-3-yne; (E)-Undec-5-en-3-yne; 3-Undecyn-5-ene
EINECS	Contact for details

Quality Control

Our (E)-5-Undecen-3-Yne is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including GC, GC-MS, and NMR, to ensure high chemical purity and structural identity. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications. We support cGMP and ISO 9001 standards for consistent quality assurance.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C to minimize degradation and volatility. Keep away from heat, sparks, and open flames. Due to its highly volatile and easily oxidized nature, containers must be kept sealed and handled under inert conditions when opened.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0% (Typical 97-99%)
Water Content (KF)	≤ 0.5%
Specific Gravity	0.75 - 0.80 g/mL @ 20°C
Boiling Point	Approx. 85-90°C @ 10 mmHg

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