Description

4-Acetamido-4'-Aminostilbene-2,2'-Disulfonic Acid, Disodium Salt is a high-purity, water-soluble organic intermediate characterized by its disulfonic acid salt structure and stilbene backbone. This compound is valued for its role as a critical building block in the synthesis of advanced colorants and optical brightening agents. It is essential for manufacturers in the dyes, pigments, and specialty chemical industries seeking to produce high-performance materials with specific chromatic and fluorescent properties.

Application

• Fluorescent Whitening Agent (FWA) Synthesis: A key precursor in the manufacture of high-efficiency optical brighteners for paper, textiles, and detergents.
• Dye and Pigment Intermediate: Used in the production of reactive, acid, and direct dyes, imparting brightness and color fastness.
• Laser Dye and Photonic Material Production: Serves as a foundational component for dyes used in tunable lasers and advanced photonic applications.
• Biochemical Research: Utilized as a fluorescent probe or tag in biochemical assays and diagnostic development due to its stilbene fluorophore.
• Polymer Additive Manufacturing: Incorporated into polymers to introduce fluorescence or UV-absorbing properties for specialty plastics and coatings.
• Analytical Chemistry Standard: Employed as a reference standard in chromatographic analysis and quality control for related chemical products.

Basic Information

Product Name	4-Acetamido-4'-Aminostilbene-2,2'-Disulfonic Acid, Disodium Salt
CAS No.	78211-74-2
Molecular Formula	C₁₆H₁₄N₂Na₂O₈S₂
Molecular Weight	488.40 g/mol
Synonyms	Disodium 4-Acetamido-4'-Aminostilbene-2,2'-Disulfonate; 4-Acetamido-4'-Aminostilbene-2,2'-Disulfonic Acid Disodium Salt; 2,2'-Stilbenedisulfonic Acid, 4-Acetamido-4'-Amino-, Disodium Salt; 4-Acetamido-4'-Aminostilbene-2,2'-Disulfonate Disodium; Tinopal CBS-X; Fluorescent Brightener 351; FWA 351; DASDA
EINECS	Contact for details

Quality Control

Our 4-Acetamido-4'-Aminostilbene-2,2'-Disulfonic Acid, Disodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing including HPLC, UV-Vis, and titration to ensure high chemical purity and consistent performance. A detailed Certificate of Analysis (COA) providing batch-specific data is available upon request to support your quality assurance and regulatory compliance needs.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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