Description

2-Butynoic Acid is a versatile four-carbon alkyne carboxylic acid, serving as a key building block in advanced organic synthesis. Its terminal alkyne and carboxylic acid functionalities make it a valuable precursor for creating complex molecular architectures. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries, where it is used to develop active ingredients, polymers, and novel materials.

Application

• Pharmaceutical Intermediate: A crucial synthon for the production of active pharmaceutical ingredients (APIs), particularly those requiring alkyne moieties for click chemistry or as structural components.
• Agrochemical Synthesis: Used in the manufacture of herbicides, fungicides, and plant growth regulators, leveraging its reactivity to create novel bioactive compounds.
• Polymer & Material Science: Acts as a monomer or cross-linking agent for synthesizing specialty polymers, coatings, and adhesives with tailored properties.
• Organic Synthesis Reagent: Employed in Sonogashira coupling, Huisgen cycloaddition, and other catalytic reactions to construct complex organic molecules in R&D settings.
• Liquid Crystal & Electronic Chemical Precursor: Serves as a starting material for synthesizing advanced materials used in displays and electronic components.
• Flavor & Fragrance Ingredient Synthesis: Used in the controlled synthesis of specific aroma compounds and fragrance molecules.

Basic Information

Product Name	2-Butynoic Acid
CAS No.	590-93-2
Molecular Formula	C4H4O2
Molecular Weight	84.07 g/mol
Synonyms	But-2-ynoic Acid; Tetrolic Acid; Acetyleneacetic Acid; 2-Butynic Acid; Propiolic Acid, Methyl-; Methylpropiolic Acid; 1-Propyn-1-carboxylic Acid; 2-Butyne-1-carboxylic Acid
EINECS	209-697-7

Quality Control

Our 2-Butynoic Acid is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive analytical documentation, including Certificates of Analysis (COA) with detailed results from GC, HPLC, and NMR analyses. Our quality commitment aligns with cGMP principles where applicable, supporting its use in regulated synthesis pathways.

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, ensure containers are clearly labeled and stored separately from bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 98.0%
Melting Point	74 - 78 °C
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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