Description

Sodium 5-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-2-Sulphonate is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chemical structure, which provides consistent color-forming properties and reactivity. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for use as a chromogenic agent in analytical chemistry and biochemical assays.

Application

• Key intermediate for the synthesis of azo dyes and pigments, particularly for shades of red, orange, and brown.
• Used as a chromogenic reagent in analytical chemistry for the detection and quantification of specific metal ions.
• Potential application in the formulation of specialized inks and colorants for industrial printing.
• Employed in research and development laboratories for studying azo coupling reactions and dye properties.
• May serve as a starting material for the production of sensitizing dyes used in photographic and imaging technologies.
• Utilized in the development of indicator papers and test strips for educational or qualitative analysis purposes.

Basic Information

Product Name	Sodium 5-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-2-Sulphonate
CAS No.	68133-05-1
Molecular Formula	C20H13N2NaO4S
Molecular Weight	400.38 g/mol
Synonyms	5-[(2-Hydroxy-1-naphthyl)azo]naphthalene-2-sulfonic acid sodium salt; C.I. 15620; Acid Orange 20; Sodium 2-hydroxy-1-naphthylazonaphthalenesulfonate; 1-Naphthalenesulfonic acid, 5-[(2-hydroxy-1-naphthyl)azo]-, sodium salt; Orange II sodium salt; Tropaeolin OO; Wool Orange A
EINECS	Contact for details

Quality Control

Our Sodium 5-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including chromatographic purity analysis and spectroscopic identification, to ensure it meets precise compositional and performance standards. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics 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 ambient temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Residue on Ignition (Sulfated Ash)	≤ 1.0%
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.