Description

Sodium 5-Chloro-2-(2-Hydroxy-1-Naphthylazo)Toluene-4-Sulfonate is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chemical structure, which provides excellent chromophoric properties and reactivity for specialized synthesis. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for use as a colorimetric reagent and chemical standard.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of specific azo dyes, particularly for coloring textiles, leather, and paper.
• Analytical Chemistry Reagent: Used as a colorimetric agent or complexometric indicator in laboratory analysis for metal ion detection.
• Research & Development: Serves as a building block in organic synthesis and material science research for novel chromophores.
• Specialty Chemical Production: Employed in the manufacture of high-value, performance chemicals where specific light-absorption properties are critical.
• Ink Formulation: Potential use in the development of specialized inks requiring specific color fastness and stability.

Basic Information

Product Name	Sodium 5-Chloro-2-(2-Hydroxy-1-Naphthylazo)Toluene-4-Sulfonate
CAS No.	2092-56-0
Molecular Formula	C₁₇H₁₁ClN₂NaO₄S
Molecular Weight	397.79 g/mol
Synonyms	5-Chloro-2-[(2-hydroxy-1-naphthyl)azo]toluene-4-sulfonic acid sodium salt; C.I. 15865; Acid Red 88 (sodium salt); Sodium 4-chloro-5-methyl-2-[(2-hydroxy-1-naphthyl)azo]benzenesulfonate; 1-Naphthol-2-azo-4-chloro-5-methylbenzenesulfonic acid sodium salt; Azo Rubine S; Azorubin S; E 122 (when used as a colorant)
EINECS	218-248-7

Quality Control

Our Sodium 5-Chloro-2-(2-Hydroxy-1-Naphthylazo)Toluene-4-Sulfonate is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet exacting standards. Certificates of Analysis (COA) detailing specific results for assay, impurities, and other critical parameters are available upon request.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents	Meets ICH guidelines

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