Description

1,4-Phenylenediamine-2,5-Disulfonic Acid is a key aromatic disulfonic acid derivative, serving as a critical intermediate in the synthesis of advanced colorants and functional materials. Its value lies in providing the essential sulfonated aromatic core required for high-performance dyes with excellent water solubility and fiber affinity. This compound is primarily needed by manufacturers in the dye and pigment industry, as well as researchers developing specialty polymers and photographic chemicals.

Application

• Primary Intermediate for Dyes & Pigments: Essential for synthesizing direct, acid, and reactive dyes, particularly for textiles like cotton, wool, and nylon.
• Functional Polymer Synthesis: Used as a monomer or building block for creating sulfonated polyamides, polyimides, and other polymers with ion-exchange or proton-conduction properties.
• Photographic Chemicals: Acts as a precursor in the production of certain color couplers and developing agents used in photographic films and papers.
• Chemical Research & Development: Serves as a versatile starting material for organic synthesis and the development of new specialty chemicals and materials.
• Liquid Crystal & Electronic Materials: Potential use in the synthesis of sulfonated compounds for advanced material applications.

Basic Information

Product Name	1,4-Phenylenediamine-2,5-Disulfonic Acid
CAS No.	7139-89-1
Molecular Formula	C6H8N2O6S2
Molecular Weight	268.27 g/mol
Synonyms	2,5-Diaminobenzene-1,4-disulfonic Acid; 1,4-Diaminobenzene-2,5-disulfonic Acid; Phenylenediamine-2,5-disulfonic Acid; 2,5-Diamino-p-benzenedisulfonic Acid; 4-Aminoaniline-2,5-disulfonic Acid; PPD-2,5-Disulfonic Acid; Benzenediamine-2,5-disulfonic Acid
EINECS	230-432-8

Quality Control

Our 1,4-Phenylenediamine-2,5-Disulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) documenting results from HPLC, titration, and other relevant tests 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, well-ventilated area at room temperature (15-25°C). Keep away from strong acids and organic solvents. The compound is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Off-white to light gray crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 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.