Description

3-Ethyl-2-Methyl-5-Sulphonatobenzoxazolium is a specialized heterocyclic organic salt, primarily recognized as a key intermediate in the synthesis of fluorescent dyes and optical brightening agents. Its value lies in its unique sulfonated benzoxazolium structure, which imparts excellent water solubility and photostability to the final products. This compound is essential for manufacturers in the textile, paper, and polymer industries seeking to enhance material whiteness and brightness, as well as for research institutions developing advanced fluorescent probes and sensors.

Application

• Optical Brightener Synthesis: A crucial precursor for manufacturing high-performance stilbene-type optical brightening agents (OBAs) used in detergents, paper, and textiles.
• Fluorescent Dye Intermediate: Serves as a building block for creating water-soluble fluorescent dyes with applications in biological staining and diagnostic assays.
• Polymer Additive Production: Used in the synthesis of monomers or additives that impart fluorescence or brightening properties to plastics and coatings.
• Research & Development: A valuable reagent in organic and materials chemistry research for developing new photoluminescent materials and sensors.
• Textile Finishing: Incorporated into finishing agents to improve the perceived whiteness and brightness of synthetic and natural fibers.
• Security Ink Formulation: Potential use in the development of specialty inks with covert fluorescent markings for authentication and anti-counterfeiting.

Basic Information

Product Name	3-Ethyl-2-Methyl-5-Sulphonatobenzoxazolium
CAS No.	63148-99-2
Molecular Formula	C10H11NO4S
Molecular Weight	241.26 g/mol
Synonyms	2-Methyl-3-ethyl-5-sulfobenzoxazolium; 5-Sulfo-3-ethyl-2-methylbenzoxazolium; Benzoxazolium, 3-ethyl-2-methyl-5-sulfo-; 3-Ethyl-2-methylbenzoxazolium-5-sulfonate; Optical Brightener Intermediate OB-1; Fluorescent Brightener 220 Intermediate
EINECS	Contact for details

Quality Control

Our 3-Ethyl-2-Methyl-5-Sulphonatobenzoxazolium is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by IR and NMR spectroscopy, to ensure it meets precise specifications for use in sensitive synthesis applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee batch-to-batch consistency and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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