Description

4,5-Diaminonaphthalene-2,7-Disulfonic Acid is a high-purity aromatic diamine disulfonic acid derivative, serving as a critical intermediate in advanced organic synthesis. Its value lies in its bifunctional nature, providing both amine and sulfonic acid groups for constructing complex molecules with specific optical or electronic properties. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking to develop high-performance products.

Application

• Key intermediate for the synthesis of high-value, water-soluble dyes and pigments.
• Precursor in the production of optical brighteners and fluorescent whitening agents.
• Building block for advanced materials, including conductive polymers and organic semiconductors.
• Used in research and development of pharmaceutical intermediates and agrochemicals.
• Essential component in the manufacture of specialized analytical reagents and chemical sensors.
• Starting material for creating complex ligands and chelating agents in coordination chemistry.

Basic Information

Product Name	4,5-Diaminonaphthalene-2,7-Disulfonic Acid
CAS No.	6362-11-4
Molecular Formula	C₁₀H₁₀N₂O₆S₂
Molecular Weight	318.32 g/mol
Synonyms	2,7-Naphthalenedisulfonic acid, 4,5-diamino-; 4,5-Diamino-2,7-naphthalenedisulfonic acid; 1,5-Diamino-3,7-naphthalenedisulfonic acid; 4,5-Diaminonaphthalene-2,7-disulphonic acid; Dinaphthonic acid; Dianisidine disulfonic acid derivative; C.I. 37250; Acid Brown 4 intermediate
EINECS	228-872-5

Quality Control

Our 4,5-Diaminonaphthalene-2,7-Disulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for use in sensitive syntheses. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability, consistency, and compliance with your specifications.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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