Description

4,4''-Diamino-2,2''-Disulfostilbene-N,N,N''N''-Tetraacetic Acid Disodium Salt is a high-purity, water-soluble chelating agent and fluorescent whitening agent intermediate. This compound is valued for its strong metal ion sequestration capabilities and its role in synthesizing advanced optical brighteners. It is essential for manufacturers in the specialty chemicals, detergent, paper, and textile industries seeking to enhance product performance and brightness. Our supply ensures consistent quality and reliable availability for your production needs.

Application

• Primary Intermediate for Fluorescent Whitening Agents (FWAs): A key building block in the synthesis of high-performance stilbene-based optical brighteners used in detergents, paper, and textiles.
• Specialty Chelating Agent: Used in formulations requiring selective binding of transition metal ions, such as in water treatment, photographic chemicals, and specific analytical reagents.
• Research & Development: Serves as a critical reagent in chemical research for developing new dyes, sensors, and metal-organic frameworks (MOFs).
• Polymer Additive: Can be incorporated into polymer systems to impart metal scavenging properties or modify optical characteristics.
• Analytical Chemistry: Employed as a complexometric titrant or a component in spectrophotometric analysis for metal ion detection.

Basic Information

Product Name	4,4''-Diamino-2,2''-Disulfostilbene-N,N,N''N''-Tetraacetic Acid Disodium Salt
CAS No.	101812-47-9
Molecular Formula	C22H20N4Na2O14S2
Molecular Weight	690.57 g/mol
Synonyms	DAS-TA Disodium Salt; 4,4'-Diaminostilbene-2,2'-disulfonic acid tetraacetic acid disodium salt; DSDTA; DAS-EDTA Disodium Salt; Stilbene-2,2'-disulfonic acid, 4,4'-diamino-, N,N,N',N'-tetraacetic acid disodium salt; Fluorescent Brightener Intermediate; Optical Brightener Intermediate VBL type; 4,4'-Bis[(carboxymethyl)amino]stilbene-2,2'-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our 4,4''-Diamino-2,2''-Disulfostilbene-N,N,N''N''-Tetraacetic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and compliance with your quality standards.

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). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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