Description

4-Amino-1,3-Benzenedisulfonic Acid is a key aromatic sulfonic acid derivative, serving as a vital intermediate in the synthesis of complex organic molecules. Its bifunctional nature, featuring both an amino and two sulfonic acid groups, makes it an essential building block for creating dyes, pigments, and specialty chemicals. This compound is particularly valuable for manufacturers in the dye, pharmaceutical, and agrochemical industries seeking to develop products with specific colorant or bioactive properties.

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of azo dyes, acid dyes, and reactive dyes, imparting colorfastness and solubility.
• Pharmaceutical Synthesis: Used as a building block in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Production: Serves as an intermediate in the synthesis of herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Employed in organic synthesis for creating novel sulfonated compounds and fine chemicals.
• Corrosion Inhibitor Formulation: Can be utilized in the production of specialty chemicals for metal surface treatment and protection.
• Photographic Chemical: Acts as a component in certain photographic developers and sensitizers.

Basic Information

Product Name	4-Amino-1,3-Benzenedisulfonic Acid
CAS No.	137-51-9
Molecular Formula	C6H7NO6S2
Molecular Weight	253.25 g/mol
Synonyms	1,3-Benzenedisulfonic acid, 4-amino-; 4-Aminobenzene-1,3-disulfonic acid; 4-Amino-m-benzenedisulfonic acid; Metanilic acid disulfonic acid; 2-Aminobenzene-1,5-disulfonic acid; 4-Amino-1,3-benzenedisulphonic acid; 4-Aminoisophthalic acid disulfonic acid (obsolete); 4-ADSA
EINECS	205-300-2

Quality Control

Our 4-Amino-1,3-Benzenedisulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for industrial and fine chemical synthesis. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment to guarantee traceability and batch-to-batch consistency.

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). Keep away from strong oxidizing agents and strong bases. The material is hygroscopic; ensure containers are sealed after use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Off-white to light gray crystalline powder
Identification (IR)	Conforms to standard
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.