Description

Sodium 4-Nitro-2-Stilbenesulphonate is a high-purity, water-soluble organic salt primarily used as a key intermediate in the synthesis of optical brighteners and fluorescent whitening agents. Its precise chemical structure enables the efficient production of compounds that impart brilliant whiteness and brightness to textiles, paper, and detergents under UV light. This product is essential for manufacturers in the specialty chemicals, textile auxiliaries, and detergent industries seeking to enhance the visual appeal and perceived cleanliness of their products.

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 the paper and textile industries.
• Textile Industry: Used in the manufacturing of brighteners applied to cotton, nylon, and other fibers to achieve high degrees of whiteness and brightness.
• Detergent and Soap Formulation: Incorporated into laundry detergents and fabric softeners to compensate for yellowing and make white fabrics appear cleaner and brighter.
• Paper Manufacturing: Employed in the production of high-brightness papers, including premium writing, printing, and specialty papers.
• Plastics and Polymers: Can be used as an additive to enhance the whiteness and visual quality of certain plastics and synthetic materials.
• Research & Development: Utilized in chemical research for developing new photoluminescent materials and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	Sodium 4-Nitro-2-Stilbenesulphonate
CAS No.	10359-69-0
Molecular Formula	C14H10NNaO6S
Molecular Weight	343.29 g/mol
Synonyms	4-Nitro-2-stilbenesulfonic acid sodium salt; Sodium 4-nitrostilbene-2-sulfonate; 2-(4-Nitrostyryl)benzenesulfonic acid sodium salt; Benzenesulfonic acid, 2-[2-(4-nitrophenyl)ethenyl]-, sodium salt (1:1); C.I. Fluorescent Brightener 140 (precursor); Fluorescent Brightener intermediate; OBA Intermediate; Tinopal CBS-X intermediate
EINECS	233-790-9

Quality Control

Our Sodium 4-Nitro-2-Stilbenesulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance as a chemical intermediate. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical characteristics are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The container should be kept tightly closed to protect from moisture.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder or crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	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.