Description

2,2′-Diamino-4,4′-Stilbenedicarboxylic Acid CAS NO 1275552-69-6 is a high-purity, functionalized stilbene derivative characterized by its diamino and dicarboxylic acid groups. This compound is a critical advanced intermediate for synthesizing high-performance optical materials, dyes, and polymers. It is primarily sought by R&D and production teams in the specialty chemicals, advanced materials, and pharmaceutical sectors for applications requiring precise molecular architecture and functionality.

Application

• Fluorescent Whitening Agent (FWA) Synthesis: A key precursor for manufacturing high-efficiency optical brighteners used in paper, textiles, and detergents.
• Advanced Polymer Monomer: Used in the production of specialty polyamides, polyimides, and other high-performance polymers with enhanced thermal and mechanical properties.
• Liquid Crystal & OLED Materials: Serves as a building block for creating organic semiconductors, charge transport materials, and emissive layers in display technologies.
• Pharmaceutical Intermediate: Employed in the research and synthesis of novel active pharmaceutical ingredients (APIs) and diagnostic agents.
• Metal-Organic Framework (MOF) Synthesis: Acts as a functional organic linker for constructing porous coordination polymers with specific adsorption or catalytic properties.
• Dye & Pigment Manufacturing: A fundamental intermediate for producing azo dyes and other complex colorants with specific light-fastness and stability.
• Crosslinking Agent: Utilized in epoxy resin systems and coatings to improve hardness, chemical resistance, and durability.
• Analytical Chemistry & Research: Used as a standard or reagent in chemical research, particularly in photochemistry and materials science studies.

Basic Information

Product Name	2,2′-Diamino-4,4′-Stilbenedicarboxylic Acid
CAS No.	1275552-69-6
Molecular Formula	C16H14N2O4
Molecular Weight	298.29 g/mol
Synonyms	4,4'-Stilbenedicarboxylic acid, 2,2'-diamino-; 2,2'-Diaminostilbene-4,4'-dicarboxylic Acid; DASD; DASDA; 2,2'-Diamino-4,4'-stilbenedicarboxylic acid; 4,4'-(1,2-Ethenediyl)bis[2-aminobenzoic acid]; 2,2'-Diaminobibenzyl-4,4'-dicarboxylic Acid (related structure); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our 2,2′-Diamino-4,4′-Stilbenedicarboxylic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistency, and traceability. Standard quality parameters include assay (HPLC), identification (IR, NMR), and control of related substances. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed in a dry environment to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%
Heavy Metals	≤ 20 ppm

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