Description

1H-Pyrazole-4-Carboxylic Acid, 3-Ethynyl-, Methyl Ester (9Ci) is a high-value, functionalized heterocyclic building block featuring both a pyrazole core and a reactive ethynyl group. This unique molecular architecture makes it a critical intermediate for the synthesis of complex molecules in advanced research and development. It is primarily sought after by pharmaceutical, agrochemical, and materials science industries for constructing novel active compounds and functional polymers.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the development of new drug candidates, particularly for targeted therapies.
• Agrochemical Synthesis: Used in the research and production of novel pesticides and herbicides with specific modes of action.
• Material Science Research: Acts as a monomer or cross-linking agent in the development of advanced polymers and specialty materials.
• Chemical Biology Probes: Utilized in creating labeled compounds and probes for studying biological processes via click chemistry.
• Ligand Synthesis: Employed in the preparation of complex ligands for catalysis and metal-organic frameworks (MOFs).
• Academic & Industrial R&D: A versatile building block for exploratory chemistry in both university and corporate research laboratories.

Basic Information

Product Name	1H-Pyrazole-4-Carboxylic Acid, 3-Ethynyl-, Methyl Ester (9Ci)
CAS No.	551943-44-3
Molecular Formula	C7H6N2O2
Molecular Weight	150.14 g/mol
Synonyms	Methyl 3-ethynyl-1H-pyrazole-4-carboxylate; 3-Ethynyl-1H-pyrazole-4-carboxylic acid methyl ester; 3-Ethynyl-4-(methoxycarbonyl)-1H-pyrazole; 1H-Pyrazole-4-carboxylic acid, 3-ethynyl-, methyl ester; 551943-44-3; Methyl 3-ethynylpyrazole-4-carboxylate
EINECS	Contact for details

Quality Control

Our 1H-Pyrazole-4-Carboxylic Acid, 3-Ethynyl-, Methyl Ester (9Ci) is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We provide comprehensive analytical data, including HPLC/GC purity and identity confirmation (IR, NMR). A Certificate of Analysis (COA) is supplied with each shipment, detailing all relevant specifications.

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 heat, sparks, and open flames. For long-term storage, consider storing under an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
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.