Description

4,4'-Bis[(4-Methoxyphenyl)Azo]Stilbene-2,2'-Disulphonic Acid is an important organic dye intermediate and functional chemical. This compound matters for its role as a key precursor in the synthesis of high-performance optical brighteners and fluorescent dyes. Industrial buyers in the textile, paper, detergent, and plastics manufacturing sectors require it to enhance product whiteness and brightness.

Application

• Primary precursor for the synthesis of optical brightening agents (OBAs) and fluorescent whitening agents (FWAs) used in detergents and soaps.
• Manufacturing of brightening agents for the paper and pulp industry to achieve high-grade whiteness.
• Key intermediate in dyes for textile and fiber applications, particularly for synthetic fibers like polyester and nylon.
• Used in the production of specialty dyes for plastics and polymers to improve aesthetic appeal.
• Potential applications in analytical chemistry as a staining agent or fluorescent probe.
• Research and development of novel functional materials with specific light-absorption or emission properties.

Basic Information

Item	Detail
Product Name	4,4'-Bis[(4-Methoxyphenyl)Azo]Stilbene-2,2'-Disulphonic Acid
CAS No.	69571-22-8
Molecular Formula	C28H24N4O8S2
Molecular Weight	608.64 g/mol
Synonyms	4,4'-Bis(4-methoxyphenylazo)stilbene-2,2'-disulfonic acid; Fluorescent Brightener Intermediate; Stilbene disulfonic acid derivative; 2,2'-(1,2-Diphenylethene-1,2-diyl)bis(4-((4-methoxyphenyl)diazenyl)benzene-1-sulfonic acid); OB-1 Intermediate; DASDSA; 4,4'-Bis[(4-anisyl)azo]stilbene-2,2'-disulfonic acid; Tinopal CBS-X related intermediate
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis[(4-Methoxyphenyl)Azo]Stilbene-2,2'-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and reliability for your synthesis processes. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment.

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 opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 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.