Description

4,4'-Dibenzamido-2,2'-stilbenedisulfonic acid is a high-purity, specialized organic intermediate characterized by its disulfonic acid and stilbene backbone. This compound matters for its role as a critical building block in the synthesis of advanced materials, particularly optical brighteners and fluorescent whitening agents. It is primarily needed by manufacturers in the dyes, pigments, and specialty chemicals industries seeking to enhance product performance.

Application

• Optical Brightening Agent (OBA) Synthesis: A key precursor in the manufacturing of stilbene-based fluorescent whitening agents used in paper, textiles, and detergents.
• High-Performance Dye Intermediate: Serves as a fundamental component for producing dyes with enhanced brightness and wash-fastness properties.
• Specialty Polymer Additives: Used in the development of polymers and coatings where optical properties and UV stability are critical.
• Analytical Chemistry & Research: Employed as a standard or reagent in photochemical studies and analytical method development.
• Fine Chemical Synthesis: Acts as a versatile intermediate for creating more complex sulfonated aromatic compounds for various industrial applications.

Basic Information

Product Name	4,4'-Dibenzamido-2,2'-Stilbenedisulfonic Acid
CAS No.	7342-14-5
Molecular Formula	C28H20N2O8S2
Molecular Weight	584.60 g/mol
Synonyms	DASD; 4,4'-Dibenzamidostilbene-2,2'-disulfonic Acid; 2,2'-Stilbenedisulfonic Acid, 4,4'-dibenzamido-; Benzenesulfonic acid, 4,4'-(1,2-ethenediyl)bis[2-[(benzoylamino)-]]; Fluorescent Brightener Intermediate; Tinopal® related intermediate; 4,4'-Bis(benzoylamino)stilbene-2,2'-disulfonic Acid
EINECS	Contact for details

Quality Control

Our 4,4'-Dibenzamido-2,2'-stilbenedisulfonic acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC and spectroscopic methods, to ensure high purity and consistent performance. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your specifications.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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