Description

9-Undecynoic Acid is a versatile terminal alkyne-containing fatty acid derivative with significant synthetic utility. Its unique structure, featuring a carboxylic acid group and a terminal alkyne moiety, makes it a valuable bifunctional building block for organic synthesis and material science. This compound is primarily sought after by researchers and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of bioactive molecules, prodrugs, and novel chemical entities via click chemistry (CuAAC) and other coupling reactions.
• Agrochemical Synthesis: Used in the development of new fungicides, herbicides, and plant growth regulators that require alkyne functionality for structure-activity optimization.
• Polymer & Material Science: Acts as a monomer or cross-linking agent for creating functional polymers, dendrimers, and surface coatings with tailored properties.
• Bioconjugation & Probe Development: Employed in labeling biomolecules (proteins, peptides, nucleic acids) for diagnostic assays, imaging, and biochemical research.
• Liquid Crystal & Organic Electronics: Utilized as a synthetic building block for mesogenic compounds and organic semiconductors.
• Chemical Biology Research: Functions as a tool compound for studying metabolic pathways and enzyme inhibition via its incorporable alkyne tag.

Basic Information

Product Name	9-Undecynoic Acid
CAS No.	22202-65-9
Molecular Formula	C₁₁H₁₈O₂
Molecular Weight	182.26 g/mol
Synonyms	10-Undecynoic Acid; Undec-10-ynoic Acid; 10-Undecynoic acid; 10-Undecynic acid; Terminal Alkyne C11 Acid; 10-Hendecynoic acid; ω-Undecynoic acid; 11-Undecynoic acid (common misnomer)
EINECS	244-818-3

Quality Control

Every batch of 9-Undecynoic Acid is produced and tested under a strict quality management system. We provide comprehensive analytical data to ensure the product meets the high-purity requirements for research and industrial synthesis. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is supplied with each shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizers, bases, and sources of ignition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	39 - 43 °C
Water Content (KF)	≤ 0.5%

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