Description

Disodium 5-(4-(4-Sulphophenylazo)Phenylazo)Salicylate 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 textile dyeing, ink formulation, and analytical chemistry sectors for producing vivid colors and as a complexometric indicator.

Application

• Textile Dye Intermediate: A key precursor for synthesizing acid dyes and direct dyes used on wool, silk, and nylon fibers.
• Ink and Pigment Manufacturing: Used in the production of colorants for inks, including those for packaging and specialty printing.
• Analytical Reagent: Functions as a metallochromic indicator in complexometric titrations for determining metal ions like calcium and magnesium.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Research & Development: Serves as a building block in chemical research for developing new chromogenic compounds and sensors.
• Paper Coloring: Employed in the manufacture of dyed papers and paper products.

Basic Information

Product Name	Disodium 5-(4-(4-Sulphophenylazo)Phenylazo)Salicylate
CAS No.	3564-27-0
Molecular Formula	C25H16N4Na2O7S
Molecular Weight	570.46 g/mol
Synonyms	Acid Chrome Blue K; Chrome Blue K; Mordant Blue 1, Disodium Salt; C.I. 43830; Disodium 5-[(4-Sulfophenyl)azo]-2-[(4-sulfophenyl)azo]salicylate; 5-(4-(4-Sulphophenylazo)Phenylazo)Salicylic Acid Disodium Salt; Calcon; Eriochrome Blue Black R
EINECS	222-622-9

Quality Control

Our Disodium 5-(4-(4-Sulphophenylazo)Phenylazo)Salicylate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye and reagent applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance.

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 tightly sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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