Description

Benzoic Acid, 3-(Chlorocarbonyl)-5-Methyl-, Methyl Ester (9Ci) is a specialized benzoic acid derivative ester, characterized by its reactive chlorocarbonyl and methyl ester functional groups. This compound serves as a versatile and high-value chemical intermediate for the synthesis of more complex molecules, particularly in advanced pharmaceutical and agrochemical research. It is primarily needed by R&D chemists and process development teams in the fine chemical, pharmaceutical, and crop protection industries seeking to build novel molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), especially for compounds requiring a substituted benzoate core.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and plant growth regulators.
• Organic Synthesis Reagent: Employed in academic and industrial laboratories for constructing complex esters, amides, and heterocyclic compounds via its reactive acyl chloride moiety.
• Material Science Precursor: Acts as a monomer or modifying agent in the development of specialty polymers and advanced organic materials.
• Dye and Pigment Intermediate: Facilitates the production of specialized colorants and imaging agents.

Basic Information

Product Name	Benzoic Acid, 3-(Chlorocarbonyl)-5-Methyl-, Methyl Ester (9Ci)
CAS No.	388072-64-8
Molecular Formula	C10H9ClO3
Molecular Weight	212.63 g/mol
Synonyms	3-(Chlorocarbonyl)-5-methylbenzoic acid methyl ester; Methyl 3-(chlorocarbonyl)-5-methylbenzoate; 5-Methylisophthalic acid monomethyl ester chloride; 3-Methoxycarbonyl-5-methylbenzoyl chloride; Methyl 5-methyl-3-[(chloro)carbonyl]benzoate
EINECS	Contact for details

Quality Control

Our production of Benzoic Acid, 3-(Chlorocarbonyl)-5-Methyl-, Methyl Ester (9Ci) adheres to stringent internal quality protocols. Each batch undergoes rigorous analytical testing to ensure high purity and consistent reactivity, critical for sensitive synthesis applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request 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. 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 hydrolysis and degradation. Recommended storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Water Content (KF)	≤ 0.5%

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