Description

4,4'-(3H-2,1-Benzoxathiol-3-Ylidene)Bis[2,5-Xylenol] S,S-Dioxide, Monosodium Salt is a specialized organic chemical salt with significant utility in advanced material science and analytical chemistry. Its unique molecular structure, featuring a benzoxathiol core, makes it a valuable chromogenic agent and a key intermediate for synthesizing functional dyes and optical sensors. This compound is essential for industrial and research laboratories focused on developing colorimetric detection systems, photostable pigments, and specialty polymer additives. We supply this high-purity material to meet the stringent demands of global B2B customers.

Application

• Chromogenic Reagent: Used as a sensitive color-forming agent in analytical test kits and diagnostic strips for the detection of specific ions or analytes.
• Dye & Pigment Intermediate: Serves as a critical precursor in the synthesis of high-performance dyes, pigments, and colorants for industrial applications.
• Optical Sensor Development: Employed in research and manufacturing of chemical sensors and indicators that change color in response to environmental stimuli.
• Polymer Additive: Functions as a functional monomer or additive to impart specific optical or stability properties to specialty polymers and coatings.
• Research & Development: A valuable tool in academic and industrial R&D for exploring new photochromic or electrochromic materials.
• Photographic Chemicals: Can be utilized in the formulation of specialized photographic and imaging chemicals.

Basic Information

Item	Details
Product Name	4,4'-(3H-2,1-Benzoxathiol-3-Ylidene)Bis[2,5-Xylenol] S,S-Dioxide, Monosodium Salt
CAS No.	86014-81-5
Molecular Formula	C23H21NaO5S2
Molecular Weight	464.52 g/mol
Synonyms	Monosodium 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis(2,5-dimethylphenolate) S,S-dioxide; SPADNS, Sodium Salt; 2,5-Xylenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide, monosodium salt; Sulfonazo III, Sodium Salt; Chromotropic acid derivative; Benzoxathiol dye intermediate; Colorimetric indicator salt
EINECS	Contact for details

Quality Control

Every batch of 4,4'-(3H-2,1-Benzoxathiol-3-Ylidene)Bis[2,5-Xylenol] S,S-Dioxide, Monosodium Salt is manufactured and tested under a strict quality management system. We ensure compliance with relevant industry standards through rigorous analytical protocols. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and consistency for your critical applications.

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 (moisture-sensitive) nature, the container must be kept sealed to minimize exposure to atmospheric humidity. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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