Description

Disodium 5,5'-[Thiobis(Phenyleneazo)]Disalicylate is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chromophoric properties and its role as a key precursor in the synthesis of specialized dyes and pigments. It is primarily required by manufacturers in the dye and pigment, analytical chemistry, and specialty chemical industries for applications demanding precise color characteristics and chemical stability.

Application

• Dye and Pigment Manufacturing: A critical intermediate for producing high-value azo dyes used in textiles, inks, and coatings.
• Analytical Reagent: Used as a colorimetric indicator or complexing agent in various chemical analysis and laboratory procedures.
• Biological Staining: Potential application in histological stains for microscopy, leveraging its specific binding and color properties.
• Photographic Chemicals: Can be utilized in the formulation of light-sensitive layers or color couplers.
• Research & Development: Serves as a building block in organic synthesis for novel chromophores and functional materials.
• Industrial Colorants: For coloring plastics, polymers, and other materials where specific shade and fastness are required.

Basic Information

Product Name	Disodium 5,5'-[Thiobis(Phenyleneazo)]Disalicylate
CAS No.	8003-87-0
Molecular Formula	C26H16N4Na2O6S
Molecular Weight	558.47 g/mol
Synonyms	Disodium 5,5'-[Thiobis(1,3-phenyleneazo)]disalicylate; Direct Yellow 4 (related class); Azo Dye Intermediate; 5,5'-[Thiobis(p-phenyleneazo)]disalicylic Acid Disodium Salt; Mordant Yellow; Thiazol Yellow G Analog; CI 24890 (related); Thiobis(phenyleneazo)disalicylate Disodium Salt
EINECS	Contact for details

Quality Control

Our Disodium 5,5'-[Thiobis(Phenyleneazo)]Disalicylate is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency, purity, and compliance with customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to guarantee traceability and quality assurance for your B2B 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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