Description

4-Isothiazolecarboxylic Acid, Methyl Ester is a versatile heterocyclic building block and key synthetic intermediate. This compound is valued for its reactive ester functionality, which facilitates further chemical transformations under mild conditions. It is primarily utilized by researchers and manufacturers in the pharmaceutical and agrochemical sectors for the development of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those targeting neurological and anti-infective applications.
• Agrochemical Synthesis: Serves as a building block for developing advanced fungicides, herbicides, and insecticides with specific modes of action.
• Organic Synthesis Reagent: Used in academic and industrial R&D for constructing complex isothiazole-containing molecular architectures.
• Material Science Research: Investigated as a monomer or functional additive for creating polymers with specialized properties.
• Bioconjugation Chemistry: Its ester group can be utilized for labeling or modifying biomolecules in biochemical research.

Basic Information

Product Name	4-Isothiazolecarboxylic Acid, Methyl Ester
CAS No.	56133-37-0
Molecular Formula	C5H5NO2S
Molecular Weight	143.16 g/mol
Synonyms	Methyl 4-isothiazolecarboxylate; Methyl isothiazole-4-carboxylate; 4-Carbomethoxyisothiazole; Isothiazole-4-carboxylic acid methyl ester; 1,2-Thiazole-4-carboxylic acid, methyl ester; 4-(Methoxycarbonyl)isothiazole; 4-Isothiazolecarboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our 4-Isothiazolecarboxylic Acid, Methyl Ester is produced under strict quality management protocols. 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 is provided with every shipment.

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 bases and incompatible materials such as strong oxidizing agents. Handle and store in accordance with good laboratory/industrial practices.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 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.