Description

4-Phenylazobenzenesulfonyl Chloride is a specialized aromatic sulfonyl chloride derivative, distinguished by its azo and phenyl functional groups. This compound serves as a versatile and critical sulfonylation reagent and intermediate in advanced organic synthesis. It is primarily utilized by research institutions and industrial R&D departments focused on developing pharmaceuticals, dyes, and functional materials.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of sulfonamide-based drug candidates and active pharmaceutical ingredients (APIs).
• Dye and Pigment Synthesis: Acts as a precursor in the production of azo dyes and specialty pigments, contributing to colorant development.
• Chemical Biology & Proteomics: Used as a reagent for modifying peptides, proteins, and other biomolecules via sulfonylation reactions.
• Polymer Chemistry: Employed in the synthesis of functional polymers and materials science research to introduce sulfonyl groups.
• Organic Synthesis Reagent: A valuable electrophile for introducing the phenylazobenzenesulfonyl moiety into complex molecular architectures.
• Analytical Chemistry: Can be used as a derivatization agent for the analysis of specific compound classes.

Basic Information

Product Name	4-Phenylazobenzenesulfonyl Chloride
CAS No.	58359-53-8
Molecular Formula	C18H13ClN2O2S
Molecular Weight	356.83 g/mol
Synonyms	p-Phenylazobenzenesulfonyl Chloride; 4-(Phenylazo)benzenesulfonyl Chloride; Benzenesulfonyl chloride, 4-(phenylazo)-; (4-Phenylazophenyl)sulfonyl Chloride; 4-Azobenzene sulfonyl chloride; 4-(Phenylhydrazono)benzenesulfonyl Chloride (tautomer); PAS-Cl; Azo Sulfonyl Chloride Reagent
EINECS	Contact for details

Quality Control

Our 4-Phenylazobenzenesulfonyl Chloride is manufactured under strict quality protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC, NMR, and FTIR, to verify identity and purity. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (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.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Heavy Metals	≤ 20 ppm

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