Description

2-Hydroxy-5-[[4-[(4-Hydroxyphenyl)Azo]-1-Naphthalenyl]Azo]Benzoic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its precise chromophoric properties and consistent performance in demanding applications. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for analytical and diagnostic purposes.

Application

• Primary Intermediate for the synthesis of high-value azo dyes and pigments, particularly for textiles and inks.
• Analytical Reagent in chemical analysis and biochemical research, often used as a colorimetric indicator or probe.
• Specialty Chemical in the production of functional dyes for non-textile applications, such as in paper or leather.
• Research & Development tool in academic and industrial labs for studying azo chemistry and developing new colored materials.
• Potential Use in the formulation of specialized inks for technical or security printing applications.

Basic Information

Product Name	2-Hydroxy-5-[[4-[(4-Hydroxyphenyl)Azo]-1-Naphthalenyl]Azo]Benzoic Acid Sodium Salt
CAS No.	6406-34-4
Molecular Formula	C23H15N4O4Na
Molecular Weight	434.38 g/mol
Synonyms	Acid Orange 20; C.I. 14600; Sodium 5-[(E)-[4-[(E)-(4-hydroxyphenyl)diazenyl]naphthalen-1-yl]diazenyl]-2-hydroxybenzoate; 1-Naphthalenol, 4-[(4-hydroxyphenyl)azo]-, diazotized, coupled with salicylic acid, sodium salt; Mordant Orange 1; Alizarine Orange R; Anthralan Orange R; Salicylic Acid, Azo Deriv. Sodium Salt
EINECS	229-064-6

Quality Control

Our production of 2-Hydroxy-5-[[4-[(4-Hydroxyphenyl)Azo]-1-Naphthalenyl]Azo]Benzoic Acid Sodium Salt adheres to stringent quality management protocols. Every batch is analyzed to ensure identity, purity, and consistency meet the high standards required for industrial and research use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment.

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 opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Orange to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 1.0%

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