Description

2-Amino-1,4-Benzenedisulfonic Acid is a vital aromatic sulfonic acid derivative, serving as a key intermediate in the synthesis of dyes, pigments, and optical brighteners. Its disulfonic acid structure provides excellent water solubility and reactivity, making it indispensable for creating vibrant and stable colorants. This compound is primarily sought by manufacturers in the dye and pigment industry, as well as by research institutions developing specialty chemicals and functional materials.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Optical Brightener Production: Used in the manufacture of fluorescent whitening agents (FWAs) for paper, detergents, and plastics.
• Chemical Synthesis: Acts as a versatile intermediate for producing more complex sulfonated aromatic compounds used in various industrial processes.
• Research & Development: Employed in academic and industrial R&D for developing new specialty chemicals, catalysts, and functional polymers.
• Pharmaceutical Intermediates: Potential use in the synthesis of certain sulfa drug precursors and other pharmacologically active molecules.

Basic Information

Product Name	2-Amino-1,4-Benzenedisulfonic Acid
CAS No.	98-44-2
Molecular Formula	C6H7NO6S2
Molecular Weight	253.25 g/mol
Synonyms	4-Amino-1,3-benzenedisulfonic Acid; 1,4-Diaminobenzene-2,5-disulfonic Acid; 2,5-Diaminobenzene-1,4-disulfonic Acid; 4-Aminobenzene-1,3-disulfonic Acid; 2-Aminobenzene-1,4-disulfonic Acid; Aniline-2,5-disulfonic Acid; 4-Amino-m-benzenedisulfonic Acid
EINECS	202-668-6

Quality Control

Our 2-Amino-1,4-Benzenedisulfonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical quality parameters. Our commitment to consistent quality and supply chain reliability supports your production and R&D needs.

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); ensure the container is kept tightly sealed 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%
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.