Description

3,8-Diaminonaphthalene-1,5-Disulphonic Acid is a key aromatic disulfonic acid derivative, serving as a critical intermediate in the synthesis of high-value dyes and pigments. Its bifunctional structure, featuring both amino and sulfonic acid groups, makes it an essential building block for creating complex colorants with specific properties. This compound is primarily utilized by manufacturers in the dye and pigment industry, as well as in research and development for advanced materials.

Application

• Primary Intermediate for Azo Dyes: Acts as a crucial diazo component for synthesizing a wide range of direct, acid, and reactive azo dyes, particularly for coloring textiles like cotton and wool.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and coatings, where lightfastness and color strength are required.
• Fluorescent Brightening Agents (FBAs): Serves as a precursor in the synthesis of optical brighteners used in paper, detergents, and textiles.
• Chemical Research & Synthesis: Employed as a versatile building block in organic synthesis for creating more complex sulfonated aromatic compounds and ligands.
• Specialty Chemicals: Potential applications in the development of corrosion inhibitors, dispersants, and other functional additives due to its sulfonic acid groups.

Basic Information

Product Name	3,8-Diaminonaphthalene-1,5-Disulphonic Acid
CAS No.	19659-81-5
Molecular Formula	C₁₀H₁₀N₂O₆S₂
Molecular Weight	318.33 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 3,8-diamino-; 3,8-Diamino-1,5-naphthalenedisulfonic acid; 4,8-Diaminonaphthalene-2,6-disulfonic acid; Dianisidine Disulfonic Acid; Chicago Acid; C-Acid; 3,8-Diaminonaphthalene-1,5-disulfonic Acid; 2,6-Diaminonaphthalene-4,8-disulfonic Acid
EINECS	243-196-5

Quality Control

Our production of 3,8-Diaminonaphthalene-1,5-Disulphonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analysis, including purity assay and impurity profiling, to meet the exacting standards of the dye and specialty chemical industries. A Certificate of Analysis (COA) detailing specific test results is provided with every shipment to guarantee compliance with your technical requirements.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to grayish powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 0.5%
Solubility	Soluble in alkaline solutions; sparingly soluble in water

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