Description

2-[(2-Hydroxy-1-Naphthalenyl)Azo]Benzoic Acid Sodium Salt is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its consistent quality and reliable performance in demanding industrial and research applications. It is primarily utilized by manufacturers in the dye and pigment industry, as well as by laboratories for colorimetric analysis and as a pH indicator.

Application

• Primary intermediate in the synthesis of azo dyes and pigments for textiles, inks, and plastics.
• Key component in the production of colorimetric pH indicators for laboratory and industrial use.
• Used as a complexometric reagent in analytical chemistry for metal ion detection.
• Employed in the manufacturing of specialty colorants for coatings and paints.
• Acts as a chromogenic agent in biochemical assays and diagnostic kits.
• Potential use in the research and development of functional dyes for optical and electronic applications.

Basic Information

Product Name	2-[(2-Hydroxy-1-Naphthalenyl)Azo]Benzoic Acid Sodium Salt
CAS No.	5850-76-0
Molecular Formula	C17H11N2NaO3
Molecular Weight	314.27 g/mol
Synonyms	Benzoic acid, 2-[(2-hydroxy-1-naphthalenyl)azo]-, sodium salt; Sodium 2-[(2-hydroxy-1-naphthyl)azo]benzoate; C.I. Mordant Orange 1; Alizarin Yellow R; Acid Alizarin Yellow R; Alizarin Yellow GG; 1-(2-Carboxyphenylazo)-2-naphthol sodium salt; 2-Hydroxy-1-(2-sulfophenylazo)naphthalene sodium salt (common misnomer)
EINECS	227-475-5

Quality Control

Our 2-[(2-Hydroxy-1-Naphthalenyl)Azo]Benzoic Acid Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets the high standards required for industrial synthesis and laboratory applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment and is 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, orange solution

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