Description

Aniline-2,5-Disulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile and critical intermediate in advanced chemical synthesis. Its value lies in providing the essential disulfonated aniline backbone required for creating complex, high-performance molecules. This compound is primarily needed by manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries for producing specialized azo dyes, active pharmaceutical ingredients (APIs), and functional chemical additives.

Application

• Primary intermediate for the synthesis of azo dyes and pigments, particularly acid dyes and direct dyes for textiles and leather.
• Key building block in pharmaceutical chemistry for constructing sulfonamide-based active pharmaceutical ingredients (APIs) and other drug candidates.
• Precursor for optical brightening agents (OBAs) and fluorescent whitening agents used in paper and detergent formulations.
• Intermediate in the production of agrochemicals, such as certain herbicides and plant growth regulators.
• Used in the manufacture of corrosion inhibitors and specialty surfactants for industrial applications.
• Starting material for research and development of advanced organic compounds in fine chemical and material science laboratories.

Basic Information

Product Name	Aniline-2,5-Disulfonic Acid
CAS No.	76684-33-8
Molecular Formula	C6H7NO6S2
Molecular Weight	253.25 g/mol
Synonyms	2,5-Disulfoaniline; 2-Aminobenzene-1,4-disulfonic Acid; Aniline-2,5-disulfonate; 1,4-Benzenedisulfonic acid, 2-amino-; 2,5-Anilinedisulfonic Acid; 4-Amino-1,3-benzenedisulfonic Acid; 2,5-Diaminobenzenedisulfonic Acid (related isomer); Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our Aniline-2,5-Disulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. Certificates of Analysis (COA) documenting purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory compliance 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light tan crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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