Description

7-Amino-4-Hydroxy-3-[(4-Methoxy-2-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid is a high-purity azo dye intermediate essential for producing vibrant and stable colorants. Its precise molecular structure is critical for achieving specific shades and performance characteristics in demanding applications. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical industries for synthesizing advanced dyes and pigments.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloration, particularly for wool, silk, and nylon.
• Key precursor in the production of pigments and colorants for inks, including printing and writing inks.
• Used in the manufacture of specialty dyes for leather and paper products.
• Employed in research and development for creating novel functional dyes with specific optical or chemical properties.
• Acts as a chemical building block in organic synthesis for more complex chromophoric systems.

Basic Information

Product Name	7-Amino-4-Hydroxy-3-[(4-Methoxy-2-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	16452-06-5
Molecular Formula	C₁₇H₁₅N₃O₈S₂
Molecular Weight	453.45 g/mol
Synonyms	7-Amino-4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]naphthalene-2-sulfonic acid; C.I. 18050; Acid Orange 33 intermediate; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]-; 3-[(4-Methoxy-2-sulfophenyl)azo]-7-amino-4-hydroxy-2-naphthalenesulfonic acid; Azo dye intermediate 16452-06-5; 7-Amino-4-hydroxy-3-(4-methoxy-2-sulfophenylazo)-2-naphthalenesulfonic acid
EINECS	Contact for details

Quality Control

Our 7-Amino-4-Hydroxy-3-[(4-Methoxy-2-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. Certificates of Analysis (COA) documenting key specifications are available upon request to support your quality assurance protocols.

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. Due to its complex azo structure, prolonged exposure to elevated temperatures or direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
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.