Description

Ethanethioic Acid, S-[4-(Chlorocarbonyl)Phenyl] Ester (9Ci) is a specialized organic intermediate featuring both a thioester and an acid chloride functional group. This unique bifunctional structure makes it a valuable building block for synthesizing more complex molecules, particularly in advanced material science and pharmaceutical research. It is primarily sought after by R&D chemists and process development scientists in the agrochemical, pharmaceutical, and polymer industries for creating novel compounds with tailored properties.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), especially those requiring thioester or aryl amide linkages.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and insecticides, leveraging its reactive chlorocarbonyl group for coupling reactions.
• Polymer Modification: Serves as a functional monomer or cross-linking agent to introduce specific chemical functionalities into polymer backbones, enhancing material properties.
• Liquid Crystal & OLED Material Research: Acts as a building block for creating advanced organic electronic materials due to its aromatic and ester components.
• Chemical Biology Probe Development: Utilized in bioconjugation and probe synthesis for studying biological processes, where the thioester group can be used for selective labeling.
• Custom Synthesis & Contract Manufacturing: A critical starting material for custom synthesis houses serving the fine chemical and life science sectors.

Basic Information

Product Name	Ethanethioic Acid, S-[4-(Chlorocarbonyl)Phenyl] Ester (9Ci)
CAS No.	129018-26-4
Molecular Formula	C9H7ClO2S
Molecular Weight	214.67 g/mol
Synonyms	4-(Acetylthio)benzoyl chloride; S-(4-Chlorocarbonylphenyl) ethanethioate; p-(Acetylthio)benzoyl chloride; 4-Acetylthiobenzoic acid chloride; Ethanethioic acid, S-(4-chlorocarbonylphenyl) ester; Acetic acid, thio-, S-[4-(chloroformyl)phenyl] ester; 129018-26-4
EINECS	Contact for details

Quality Control

Our production of Ethanethioic Acid, S-[4-(Chlorocarbonyl)Phenyl] Ester (9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and reliability for your synthetic processes. Each lot is characterized by advanced analytical techniques including HPLC, GC, and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases, oxidizing agents, and alcohols.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 2.0%

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