Description

4,5-Diamino-1-Naphthalenesulfonic Acid is a key aromatic sulfonic acid derivative featuring two amino groups, making it a versatile intermediate for advanced synthesis. Its primary value lies in its role as a crucial building block for the production of high-performance dyes, pigments, and functional materials. This compound is essential for manufacturers and R&D teams in the dye and pigment, pharmaceutical, and specialty chemical industries seeking to develop products with specific colorimetric or chelating properties.

Application

• Dye and Pigment Intermediate: A critical precursor for synthesizing azo dyes, acid dyes, and reactive dyes, particularly for textiles, leather, and paper.
• Pharmaceutical Synthesis: Serves as a building block in the development of active pharmaceutical ingredients (APIs) and diagnostic agents.
• Analytical Reagent: Used in the formulation of reagents for chemical analysis and as a chelating agent for metal ion detection.
• Corrosion Inhibitor Formulation: Employed in the production of specialty chemicals that protect metal surfaces in industrial processes.
• Photographic Chemical: Used in the synthesis of chemicals for photographic development and imaging technologies.
• Research & Development: A valuable compound for academic and industrial research in organic synthesis and material science.

Basic Information

Product Name	4,5-Diamino-1-Naphthalenesulfonic Acid
CAS No.	6362-18-1
Molecular Formula	C₁₀H₁₀N₂O₃S
Molecular Weight	238.26 g/mol
Synonyms	1,5-Diaminonaphthalene-4-sulfonic Acid; 1-Naphthalenesulfonic acid, 4,5-diamino-; 4,5-Diaminonaphthalene-1-sulfonic Acid; 4-Amino-5-aminonaphthalene-1-sulfonic Acid; 5-Amino-4-aminonaphthalene-1-sulfonic Acid; 1,5-Naphthalenediamine-4-sulfonic Acid; C.I. 37190; DANS Acid
EINECS	228-870-5

Quality Control

Our 4,5-Diamino-1-Naphthalenesulfonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light brown to grayish powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 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.