Description

4-Benzenesulfonylbenzoic Acid is a high-purity organic intermediate featuring a sulfonyl linker between two aromatic rings, offering versatile reactivity for advanced synthesis. This compound is valued for its role as a key building block in the development of pharmaceuticals, agrochemicals, and specialty polymers. It is primarily sought by R&D chemists and process development teams in the fine chemical, pharmaceutical, and material science industries for creating novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a sulfonyl-bridged biphenyl structure.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and plant growth regulators.
• Polymer & Material Science: Serves as a monomer or cross-linking agent for producing high-performance polymers, liquid crystals, and specialty coatings.
• Organic Synthesis & Research: A versatile building block for Suzuki coupling, esterification, and amidation reactions in academic and industrial R&D laboratories.
• Dye & Pigment Manufacturing: Employed in the synthesis of complex organic dyes and pigments due to its stable aromatic structure.

Basic Information

Product Name	4-Benzenesulfonylbenzoic Acid
CAS No.	5361-54-6
Molecular Formula	C13H10O4S
Molecular Weight	262.28 g/mol
Synonyms	[4-(Phenylsulfonyl)benzoic acid]; p-(Phenylsulfonyl)benzoic acid; 4-(Benzenesulfonyl)benzoic acid; Benzoic acid, 4-(phenylsulfonyl)-; NSC 403107; BSB Acid
EINECS	226-341-4

Quality Control

Our 4-Benzenesulfonylbenzoic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets the high standards required for synthetic applications. Certificates of Analysis (COA) with detailed batch-specific results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and heat sources.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	228 - 232 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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