Description

Sodium 4-Aminostilbene-2-Sulphonate is a high-purity, water-soluble organic salt primarily used as a key intermediate in the synthesis of optical brighteners and fluorescent dyes. This compound matters for its ability to impart brilliant whiteness and fluorescence to materials, enhancing their visual appeal and performance in demanding applications. It is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to improve product quality and market competitiveness.

Application

• Optical Brightening Agent (OBA) Synthesis: A critical building block for producing stilbene-based fluorescent whitening agents used in detergents and paper.
• Textile & Fiber Treatment: Used in the manufacture of brighteners for cotton, nylon, and other synthetic fibers to achieve high whiteness.
• Paper Coating & Bleaching: Incorporated into paper coatings to enhance brightness and opacity, reducing the need for blueing agents.
• Plastics & Polymer Additive: Serves as an intermediate for brighteners added to polymers, resins, and films to counteract yellowing.
• Analytical & Research Chemistry: Employed as a standard or reagent in fluorescence studies and chemical research.
• Specialty Dye Manufacturing: Acts as a precursor for certain fluorescent dyes and pigments with specific light-emitting properties.

Basic Information

Product Name	Sodium 4-Aminostilbene-2-Sulphonate
CAS No.	41427-13-8
Molecular Formula	C14H12NNaO3S
Molecular Weight	297.30 g/mol
Synonyms	4-Amino-2-stilbenesulfonic acid sodium salt; Sodium 4-amino-2-styrylbenzenesulfonate; 4,4'-Diaminostilbene-2,2'-disulfonic acid derivative; Tinopal® intermediate; Fluorescent brightener intermediate; 2-Styryl-5-aminobenzenesulfonic acid sodium salt; 4-Aminostilbene-2-sulfonic acid sodium salt; Stillbene 420
EINECS	Contact for details

Quality Control

Our Sodium 4-Aminostilbene-2-Sulphonate is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including HPLC for assay and purity, to meet precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Solubility (in Water)	Clear, yellow solution

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