Description

Benzenediazonium, 4-Sulfo- CAS NO 4332-41-6 is a versatile diazonium salt derivative, primarily valued as a key intermediate for introducing the sulfophenyl group into target molecules. Its primary commercial significance lies in enabling the synthesis of azo dyes, pigments, and functional materials through efficient diazo coupling reactions. This compound is essential for manufacturers in the dyestuff, textile chemical, and specialty polymer industries seeking to develop colorants and surface-modifying agents.

Application

• Azo Dye & Pigment Synthesis: Serves as a critical precursor for manufacturing acid dyes, direct dyes, and reactive dyes used in textiles, leather, and paper.
• Functional Polymer Modification: Used to graft sulfonated aromatic groups onto polymer backbones to impart hydrophilicity, ionic conductivity, or dye-affinity.
• Surface Chemistry & Coupling Agent: Acts as a diazonium coupling agent for modifying surfaces of metals, carbon materials, or semiconductors to create functional monolayers.
• Chemical Research Intermediate: Employed in organic synthesis for constructing complex sulfonated aromatic compounds and heterocycles.
• Photographic Chemicals: Can be utilized in the synthesis of certain light-sensitive compounds and color couplers for imaging applications.

Basic Information

Product Name	Benzenediazonium, 4-Sulfo-
CAS No.	4332-41-6
Molecular Formula	C6H5N2O3S
Molecular Weight	185.18 g/mol
Synonyms	4-Sulfobenzenediazonium; p-Diazobenzenesulfonic Acid; Benzenesulfonic Acid, 4-Diazo-; Diazonium, 4-Sulfophenyl-; 4-Diazobenzenesulfonate; p-Sulfobenzenediazonium Hydroxide Inner Salt
EINECS	224-394-5

Quality Control

Our production of Benzenediazonium, 4-Sulfo- adheres to stringent internal quality protocols to ensure batch-to-batch consistency and reliability. Each lot is analyzed to confirm identity, purity, and the absence of critical impurities that could affect downstream coupling efficiency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under dry conditions to prevent decomposition. Isolate from incompatible materials such as strong bases, reducing agents, and heat sources.

Specification

Item	Specification
Appearance	Light yellow to beige crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility	Soluble in water, aqueous alkali

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