Description

Diazonaphthalenedisulfonic Acid is a specialized aromatic sulfonic acid derivative, valued for its role as a key intermediate in the synthesis of dyes and pigments. Its chemical structure makes it a crucial precursor for creating azo compounds with specific color and light-fastness properties. This product is primarily required by manufacturers in the dye and pigment, fine chemical synthesis, and research and development sectors.

Application

• Primary intermediate in the synthesis of azo dyes and pigments for textiles, inks, and plastics.
• Precursor for the production of optical brightening agents and fluorescent whitening compounds.
• Building block in fine chemical and pharmaceutical intermediate synthesis.
• Used in research and development for novel functional materials and specialty chemicals.
• Potential component in the formulation of corrosion inhibitors and specialty surfactants.
• Reagent in analytical chemistry and chromatographic applications.

Basic Information

Product Name	Diazonaphthalenedisulfonic Acid
CAS No.	20971-43-1
Molecular Formula	C10H6N2O6S2
Molecular Weight	314.29 g/mol
Synonyms	1-Diazo-2-naphthol-4,8-disulfonic Acid; 1,2-Naphthoquinone-1-diazide-4-sulfonic Acid (related); DNDS Acid; Diazonaphtholdisulfonic Acid; 1-Diazo-2-oxo-1,2-dihydronaphthalene-4,8-disulfonic Acid; Naphthalenediazonium-4,8-disulfonate (inner salt form); Diazo Component for Azo Dyes
EINECS	Contact for details

Quality Control

Our Diazonaphthalenedisulfonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance as a chemical intermediate. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and sulfonic acid content are available upon request to support your quality assurance protocols.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong bases and reducing agents.

Specification

Item	Specification
Appearance	Yellow to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfonic Acid Content (Titration)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water, alkaline solutions

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