Description

3-Pentynoic Acid is a versatile alkyne-containing carboxylic acid building block, essential for advanced organic synthesis and material science. Its terminal alkyne and carboxylic acid functionalities enable precise molecular construction through click chemistry, Sonogashira coupling, and amide bond formation. This high-purity intermediate is critical for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries developing novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Serves as a key synthon for constructing complex molecules via Huisgen cycloaddition (click chemistry) and cross-coupling reactions, targeting new drug candidates.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and plant growth regulators that incorporate alkyne motifs for enhanced biological activity.
• Polymer & Material Science: Acts as a monomer or functionalizing agent for creating specialty polymers, dendrimers, and surface coatings with tailored properties.
• Ligand & Catalyst Development: Employed in the synthesis of sophisticated ligands for metal catalysis and organocatalysts used in asymmetric synthesis.
• Bioconjugation & Probe Chemistry: Facilitates the labeling of biomolecules (proteins, peptides, nucleic acids) for diagnostic assays and imaging applications.
• Organic Electronic Materials: A building block for π-conjugated systems and molecular wires in the research of organic semiconductors and electronic devices.

Basic Information

Product Name	3-Pentynoic Acid
CAS No.	36781-65-4
Molecular Formula	C5H6O2
Molecular Weight	98.10 g/mol
Synonyms	Pent-3-ynoic Acid; 3-Pentyn-1-oic Acid; Propiolic Acid, Ethyl-; Ethylpropiolic Acid; 3-Butyne-1-carboxylic Acid (common misnomer); 2-Propynylacetic Acid; 3-Pentynic Acid
EINECS	Contact for details

Quality Control

Our 3-Pentynoic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chromatographic purity analysis and identity confirmation, to ensure it meets the high standards required for research and industrial synthesis. A Certificate of Analysis (COA) detailing specific results for purity, appearance, and other critical parameters is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its nature as a strong acid/organic solvent, store separately from incompatible materials such as strong bases, oxidizing agents, and reducing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 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.