Description

7-Hydroxy-8-[(4-Nitrophenyl)Azo]Naphthalene-2-Sulphonic Acid is a specialized azo dye intermediate characterized by its distinct molecular structure, which is critical for imparting specific color properties. This compound is valued for its role in synthesizing high-performance dyes and pigments with excellent light and wash fastness. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and coatings, offering good tinting strength.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo coupling reactions.
• Specialty Colorants: Potential use in the formulation of specialized dyes for leather, paper, and biological staining applications.
• Analytical Chemistry: May be utilized as a pH indicator or a complexometric agent in certain analytical procedures due to its azo and sulphonic acid groups.

Basic Information

Product Name	7-Hydroxy-8-[(4-Nitrophenyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	68959-12-6
Molecular Formula	C₁₆H₁₁N₃O₆S
Molecular Weight	373.34 g/mol
Synonyms	7-Hydroxy-8-[(4-nitrophenyl)diazenyl]naphthalene-2-sulfonic acid; 2-Naphthalenesulfonic acid, 7-hydroxy-8-[(4-nitrophenyl)azo]-; C.I. 18050; Acid Orange 86 intermediate; 8-[(4-Nitrophenyl)azo]-7-hydroxynaphthalene-2-sulfonic acid; 4-Nitrobenzeneazohydroxy J acid; Azo dye intermediate derived from J-acid
EINECS	Contact for details

Quality Control

Our production of 7-Hydroxy-8-[(4-Nitrophenyl)Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. The material is tested against established in-house specifications using advanced analytical techniques. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance processes.

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). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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