Description

1,8-Naphthalenedicarboxylic Anhydride -4-Sulpho Potassium Salt is a high-purity, functionalized naphthalene derivative, serving as a critical intermediate in advanced organic synthesis. Its value lies in the unique combination of an anhydride and a sulfonate group, enabling precise chemical modifications and enhanced solubility for demanding applications. This compound is essential for manufacturers in the dye, pigment, and specialty polymer industries seeking to develop products with specific optical or material properties.

Application

• Key Intermediate for Fluorescent Brightening Agents (FBAs): A primary building block in the synthesis of high-performance optical brighteners used in paper, textiles, and detergents.
• Synthesis of Functional Dyes and Pigments: Used to create naphthalimide-based dyes with excellent light fastness and vivid colors for technical applications.
• Advanced Material Precursor: Serves as a monomer or modifying agent in the production of specialty polymers, including polyimides and conductive materials.
• Biomolecular Labeling and Probes: Employed in the development of fluorescent tags and sensors for biological and diagnostic research due to its derivatizable structure.
• Liquid Crystal and OLED Materials: A valuable intermediate for creating charge-transporting or emissive layers in electronic display technologies.
• Corrosion Inhibitor Formulations: Used in the development of specialized chemical treatments for metal surface protection.

Basic Information

Product Name	1,8-Naphthalenedicarboxylic Anhydride -4-Sulpho Potassium Salt
CAS No.	50817-71-5
Molecular Formula	C12H5KO7S
Molecular Weight	332.33 g/mol
Synonyms	4-Sulfo-1,8-naphthalic anhydride potassium salt; Potassium 4-sulfo-1,8-naphthalenedicarboxylic anhydride; 1,8-Naphthalic anhydride-4-sulfonic acid potassium salt; 4-Sulfonaphthalic anhydride potassium salt; NDSA-K; K-NDA; 1,8-Naphthalimide-4-sulfonate potassium salt precursor; Benzo[de]isochromene-1,3-dione, 6-sulfo-, potassium salt (1:1)
EINECS	Contact for details

Quality Control

Our 1,8-Naphthalenedicarboxylic Anhydride -4-Sulpho Potassium Salt is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide Certificates of Analysis (COA) with key parameters including assay, impurity profile, and loss on drying. Our quality commitment supports applications requiring high-purity intermediates for sensitive chemical synthesis.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity 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%
Sulfonate Content (Titration)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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