Description

Diazobenzenesulfonic Acid CAS NO 2154-66-7 is a specialized diazonium salt derivative of benzenesulfonic acid, serving as a critical intermediate in advanced organic synthesis. Its value lies in its unique reactivity as a source of the diazonium functional group, enabling precise coupling reactions and the introduction of sulfonic acid moieties. This compound is essential for research chemists and industrial manufacturers in the fine chemical, pharmaceutical, and dye industries who require high-purity building blocks for complex molecule construction.

Application

• Azo Dye Synthesis: A key precursor for generating a wide range of sulfonated azo dyes and pigments, valued for their color fastness and solubility.
• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) and diagnostic agents that incorporate diazo or sulfonate groups.
• Polymer Modification: Employed to introduce ionic sulfonate groups into polymer chains, enhancing properties like hydrophilicity and dyeability.
• Cross-linking Agent: Functions in the surface modification of materials and the preparation of specialty resins through diazo coupling reactions.
• Analytical Reagent: Utilized in biochemical and chemical research as a derivatization agent or probe for specific functional groups.
• Photoactive Compounds: Serves as a building block for materials used in photoresists and other light-sensitive applications.

Basic Information

Product Name	Diazobenzenesulfonic Acid
CAS No.	2154-66-7
Molecular Formula	C6H5N2O3S
Molecular Weight	185.18 g/mol
Synonyms	Benzenediazonium, 4-sulfo-; 4-Diazobenzenesulfonic Acid; p-Diazobenzenesulfonic Acid; Benzenesulfonic acid, diazo-; Diazonium benzenesulfonate; Sulfanilic acid diazonium salt
EINECS	218-452-7

Quality Control

Our Diazobenzenesulfonic Acid is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and moisture content. Our commitment to reliable supply and batch-to-batch consistency supports your critical R&D and production processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic and light-sensitive nature, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent moisture absorption and decomposition. Keep away from strong bases, reducing agents, and heat sources.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 5.0%
Solubility	Soluble in water and polar organic solvents

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