Description

Benzoic Acid, 4-(Chlorocarbonyl)-3-Methyl- (9Ci) is a versatile aromatic carboxylic acid derivative, specifically a chlorocarbonyl-substituted benzoic acid. This compound serves as a critical high-purity building block for synthesizing more complex molecules in advanced chemical manufacturing. It is primarily needed by pharmaceutical, agrochemical, and specialty chemical industries for research and production-scale applications.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly those with substituted benzamide or ester functionalities.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators where its reactive chlorocarbonyl group enables further derivatization.
• Polymer Chemistry: Acts as a monomer or modifying agent for producing specialty polymers, coatings, and resins with specific thermal or chemical properties.
• Liquid Crystal & OLED Materials: Serves as a building block for advanced electronic materials due to its aromatic core and functional handles for creating complex structures.
• Dye & Pigment Manufacturing: Intermediate in the synthesis of organic dyes, pigments, and colorants.
• Chemical Research & Development: Valuable reagent in organic synthesis laboratories for constructing novel compounds and exploring new reaction pathways.

Basic Information

Product Name	Benzoic Acid, 4-(Chlorocarbonyl)-3-Methyl- (9Ci)
CAS No.	126736-28-5
Molecular Formula	C9H7ClO3
Molecular Weight	198.60 g/mol
Synonyms	4-(Chlorocarbonyl)-3-methylbenzoic acid; 3-Methyl-4-(chloroformyl)benzoic acid; 4-Carboxy-2-methylbenzoyl chloride; 2-Methylterephthaloyl chloride monoacid; Terephthalic acid, 2-methyl-, 4-chloride; 2-Methyl-1,4-benzenedicarboxylic acid 4-chloride 1-carboxylic acid
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 4-(Chlorocarbonyl)-3-Methyl- (9Ci) is produced under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets the high-purity standards required for synthetic applications. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Contact for details

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