Description

5-Amino-2-[2-(4-Amino-2-Sulfophenyl)Ethyl]Benzenesulfonic Acid is a specialized aromatic sulfonic acid derivative featuring dual amino and sulfonic acid functional groups, making it a valuable intermediate for complex synthesis. This compound matters for its role as a key building block in the production of high-performance dyes and pigments, where its structure enables precise color tuning and enhanced fastness properties. It is primarily needed by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced functional materials and optical sensors.

Application

• Dye & Pigment Intermediate: A critical precursor for synthesizing azo dyes, acid dyes, and reactive dyes, particularly for textiles, leather, and paper.
• Functional Material Synthesis: Used in the research and development of organic semiconductors, conductive polymers, and nonlinear optical materials.
• Chemical Research: Serves as a versatile building block in organic synthesis for creating complex molecules with specific sulfonation and amination patterns.
• Analytical Reagent: Potential use as a reagent or standard in analytical chemistry for method development and calibration.

Basic Information

Product Name	5-Amino-2-[2-(4-Amino-2-Sulfophenyl)Ethyl]Benzenesulfonic Acid
CAS No.	5136-34-5
Molecular Formula	C14H16N2O6S2
Molecular Weight	372.42 g/mol
Synonyms	4,4'-Diaminodiphenylmethane-2,2'-disulfonic Acid; 2,2'-Disulfonic Acid-4,4'-Diaminodiphenylmethane; 4,4'-Methylenedianiline-2,2'-disulfonic Acid; 2,2'-Disulfo-4,4'-methylenedianiline; Bis(2-sulfo-4-aminophenyl)methane; 4,4'-Diamino-2,2'-disulfodiphenylmethane; 4,4'-Methylenebis(2-aminobenzenesulfonic acid); 2,2'-Disulfobenzidine derivative
EINECS	225-881-2

Quality Control

Our production of 5-Amino-2-[2-(4-Amino-2-Sulfophenyl)Ethyl]Benzenesulfonic Acid adheres to a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture. For long-term storage, consider using desiccants or an inert atmosphere to minimize potential oxidation.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
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.