Description

2-Amino-4,8-Naphthalenedisulfonic Acid is a high-purity, versatile aromatic sulfonic acid derivative that serves as a critical intermediate in advanced chemical synthesis. Its value lies in its bifunctional structure, featuring both an amino group and two sulfonic acid groups, enabling its use in the production of sophisticated dyes and functional materials. This compound is essential for manufacturers and R&D laboratories in the dyestuff, pigment, and specialty chemical industries seeking reliable, high-quality intermediates.

Application

• Dye and Pigment Intermediate: A key building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles and leather.
• Optical Brightener Production: Used in the manufacture of fluorescent whitening agents (FWAs) for paper, detergents, and plastics.
• Functional Chemical Synthesis: Serves as a precursor for liquid crystal materials, electro-optical compounds, and other advanced organic materials.
• Research & Development: Employed in academic and industrial R&D for exploring new aromatic sulfonation reactions and creating novel polymeric structures.
• Chemical Standard: Used as a high-purity reference standard in analytical chemistry and quality control laboratories.

Basic Information

Product Name	2-Amino-4,8-Naphthalenedisulfonic Acid
CAS No.	131-27-1
Molecular Formula	C₁₀H₉NO₆S₂
Molecular Weight	303.31 g/mol
Synonyms	4,8-Disulfo-2-naphthylamine; 2-Naphthylamine-4,8-disulfonic Acid; 2-Amino-4,8-disulfonaphthalene; 4,8-Disulfonaphthylamine; 1-Amino-3,7-disulfonaphthalene; 2-Aminonaphthalene-4,8-disulfonic Acid; 4,8-Disulfo-2-aminonaphthalene; 2-Amino-4,8-di-sulfonaphthalene
EINECS	205-019-5

Quality Control

Our 2-Amino-4,8-Naphthalenedisulfonic 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 the stringent requirements of our industrial and research clients. A detailed Certificate of Analysis (COA) is provided with every shipment, guaranteeing traceability and consistent batch-to-batch quality.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). The product 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 gray powder
Identification (IR)	Conforms to structure
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.