Description

4-Acetamido-4'-Nitrostilbene-2,2'-Disulfonic Acid, Disodium Salt is a high-purity, water-soluble organic intermediate of significant commercial importance. This compound is valued for its role as a key precursor in the synthesis of optical brighteners and fluorescent whitening agents. It is primarily required by manufacturers in the textile, paper, detergent, and plastics industries seeking to enhance product whiteness and brightness.

Application

• Primary Intermediate for Optical Brightening Agents (OBAs): Serves as a critical building block in the synthesis of stilbene-based fluorescent whitening agents used extensively in textiles, papers, and plastics.
• Textile Industry: Used in the production of brighteners applied to cotton, nylon, and other fibers to achieve high degrees of whiteness.
• Paper Manufacturing: Incorporated into paper coatings and pulps to improve optical brightness and perceived quality of printing and writing papers.
• Detergent Formulations: A key raw material for brighteners added to laundry detergents and fabric softeners to make white fabrics appear brighter and colors more vivid.
• Plastics and Polymers: Employed in the manufacture of brighteners for synthetic fibers (e.g., polyester) and plastic materials to counteract yellowing.
• Research & Development: Utilized in chemical research for developing new fluorescent dyes, sensors, and advanced organic materials.
• Specialty Chemical Synthesis: Acts as a sulfonated aromatic intermediate for further chemical transformations in fine chemical production.

Basic Information

Product Name	4-Acetamido-4'-Nitrostilbene-2,2'-Disulfonic Acid, Disodium Salt
CAS No.	78211-77-5
Molecular Formula	C₁₆H₁₂N₂Na₂O₉S₂
Molecular Weight	494.38 g/mol
Synonyms	4-Acetamido-4'-nitrostilbene-2,2'-disulfonic acid disodium salt; Disodium 4-acetamido-4'-nitrostilbene-2,2'-disulfonate; 4-Acetamido-4'-nitro-2,2'-stilbenedisulfonic acid disodium salt; ANSA disodium salt; Fluorescent Brightener intermediate; OBA precursor; 2,2'-(4-Acetamido-4'-nitro-1,2-ethenediyl)bis[benzenesulfonic acid] disodium salt
EINECS	Contact for details

Quality Control

Our 4-Acetamido-4'-Nitrostilbene-2,2'-Disulfonic Acid, Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity and performance as a critical intermediate. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and sulfonation degree are provided to guarantee compliance with your process requirements.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content	≤ 2.0%
Sulfonation Degree	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, yellow solution

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