Description

4-Sulfo-1,8-Naphthalic Anhydride Potassium Salt is a functionalized naphthalic anhydride derivative, valued for its role as a key intermediate in the synthesis of advanced dyes, fluorescent brighteners, and optical materials. Its sulfonated potassium salt form offers enhanced solubility and stability, making it a versatile building block for high-performance chemical products. This compound is primarily sought by manufacturers in the specialty chemicals, textile auxiliaries, and advanced material research sectors.

Application

• Fluorescent Brightening Agent (FBA) Synthesis: A critical intermediate for producing high-efficiency optical brighteners used in paper, textiles, and detergents.
• Functional Dye Manufacturing: Serves as a precursor for acid dyes, reactive dyes, and other specialty colorants requiring sulfonic acid groups for water solubility and fiber affinity.
• Advanced Material Research: Used in the development of organic light-emitting diodes (OLEDs), fluorescent sensors, and other photonic materials due to its naphthalimide core.
• Biochemical Labeling: Potential application in creating fluorescent tags and probes for bioimaging and diagnostic assays.
• Polymer Modification: Can be incorporated into polymers to impart fluorescence or alter surface properties.
• Analytical Chemistry: May be used as a reagent or standard in chromatographic and spectroscopic methods.

Basic Information

Product Name	4-Sulfo-1,8-Naphthalic Anhydride Potassium Salt
CAS No.	71501-16-1
Molecular Formula	C12H5KO6S
Molecular Weight	316.33 g/mol
Synonyms	Potassium 4-Sulfo-1,8-naphthalic Anhydride; 1,8-Naphthalic Anhydride-4-sulfonic Acid Potassium Salt; 4-Sulfo-1,8-naphthalenedicarboxylic Anhydride Potassium Salt; Benzo[de]isochromene-1,3-dione, 6-sulfo-, potassium salt (1:1); 6-Sulfobenzo[de]isochromene-1,3-dione potassium salt; 4-Sulfo-1,8-naphthalic anhydride K salt; K-SNA
EINECS	Contact for details

Quality Control

Our 4-Sulfo-1,8-Naphthalic Anhydride Potassium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and consistency for your production processes.

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 sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfate Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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