Description

4-Isothiazolecarboxylic Acid, 3-Chloro is a high-purity heterocyclic building block of significant interest in advanced organic synthesis. This compound serves as a critical intermediate for the development of novel active pharmaceutical ingredients (APIs) and agrochemicals. It is primarily sought after by research and development teams in the pharmaceutical, agrochemical, and specialty chemical industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: Key synthon for the research and development of new drug candidates, particularly in medicinal chemistry programs.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and insecticides, leveraging the bioactive isothiazole core.
• Organic Synthesis Building Block: Employed in academic and industrial R&D for constructing complex heterocyclic compounds and fine chemicals.
• Material Science Research: Potential precursor for the synthesis of specialty polymers or functional materials with specific electronic properties.
• Bioconjugation & Labeling Reagent: The carboxylic acid functionality allows for derivatization and conjugation in biochemical applications.

Basic Information

Product Name	4-Isothiazolecarboxylic Acid, 3-Chloro
CAS No.	933690-30-3
Molecular Formula	C4H2ClNO2S
Molecular Weight	163.58 g/mol
Synonyms	3-Chloro-1,2-thiazole-4-carboxylic acid; 3-Chloro-4-isothiazolecarboxylic acid; 3-Chloroisothiazole-4-carboxylic acid; 3-Chloro-1,2-thiazole-4-carboxylic acid; 4-Carboxy-3-chloroisothiazole
EINECS	Contact for details

Quality Control

Our 4-Isothiazolecarboxylic Acid, 3-Chloro is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for each lot, detailing key parameters such as assay, identity, and impurity profiles. Our quality system is designed to meet the stringent requirements of research and cGMP-grade production environments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which may affect stability and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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