Description

Benzoic Acid, 4-(Chlorocarbonyl)- (9Ci) is a key aromatic acid chloride derivative, serving as a versatile and reactive building block in advanced organic synthesis. Its primary value lies in its ability to introduce the 4-carboxybenzoyl moiety, enabling the construction of complex molecules with specific functional properties. This intermediate is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries who require high-purity precursors for drug development, crop protection agents, and high-performance materials.

Application

• Pharmaceutical Intermediate: Critical for synthesizing active pharmaceutical ingredients (APIs), particularly non-steroidal anti-inflammatory drugs (NSAIDs) and other therapeutics containing a benzoic acid core.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators where its aromatic structure contributes to biological activity.
• Polymer & Material Science: Acts as a monomer or modifying agent in the synthesis of polyesters, polyamides, and liquid crystal polymers, enhancing thermal and mechanical properties.
• Dye & Pigment Manufacturing: Serves as a precursor for azo dyes and organic pigments, providing color fastness and stability.
• Organic Synthesis Reagent: Employed in peptide coupling reactions and as an acylating agent in laboratory-scale and pilot-plant research.
• Crosslinking Agent: Utilized in the formulation of coatings, adhesives, and resins to improve durability and chemical resistance.

Basic Information

Product Name	Benzoic Acid, 4-(Chlorocarbonyl)- (9Ci)
CAS No.	18708-46-8
Molecular Formula	C8H5ClO3
Molecular Weight	184.57 g/mol
Synonyms	4-(Chlorocarbonyl)benzoic acid; Terephthalic acid chloride; Terephthaloyl chloride (Note: This is the di-acid chloride; the mono-acid chloride is less common); 4-Carboxybenzoyl chloride; p-Carboxybenzoyl chloride; Benzoyl chloride, 4-carboxy-; Terephthalic acid monochloride; 1,4-Benzenedicarboxylic acid, monochloride
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 4-(Chlorocarbonyl)- is produced under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the exacting standards required for synthetic applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and reacts with strong acids/organic solvents; keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis and degradation. Isolate from incompatible materials such as bases, alcohols, and amines.

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.