Description

4-Pentynoic Acid is a versatile alkyne-containing carboxylic acid building block, essential for advanced organic synthesis. Its terminal alkyne and carboxylic acid functionalities make it a critical intermediate for constructing complex molecular architectures via click chemistry and cross-coupling reactions. This high-purity compound is primarily sought after by pharmaceutical, agrochemical, and material science research and development teams.

Application

• Key synthetic intermediate in pharmaceutical research for developing new active pharmaceutical ingredients (APIs).
• Building block for agrochemical synthesis, particularly for creating novel herbicides and fungicides with alkyne motifs.
• Precursor for polymer and advanced material science, used in the synthesis of functional monomers and dendrimers.
• Essential reagent in bioconjugation and click chemistry (e.g., CuAAC reactions) for labeling biomolecules.
• Starting material for the synthesis of heterocyclic compounds and complex natural product analogs.
• Intermediate in organic electronic material development for OLEDs and semiconductors.

Basic Information

Item	Details
Product Name	4-Pentynoic Acid
CAS No.	6089-09-4
Molecular Formula	C5H6O2
Molecular Weight	98.10 g/mol
Synonyms	Pent-4-ynoic Acid; 4-Pentyn-1-oic Acid; 3-Butyn-1-carboxylic Acid; 4-Pentynic Acid; 3-Butyne-1-carboxylic Acid; 4-Pentynoic acid (6CI); 3-Butynoic acid (homolog)
EINECS	Contact for details

Quality Control

Our 4-Pentynoic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatographic purity analysis and identity confirmation, to ensure it meets the high standards required for research and industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This compound is easily oxidized; for long-term storage, consider keeping under an inert atmosphere such as nitrogen or argon.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (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.