Description

4-[(1-Hydroxy-4-Naphtyl)Azo]Benzenesulfonic Acid is a specialized azo dye intermediate and organic synthesis building block. This compound is valued for its precise molecular structure, which is critical for producing high-performance colorants and functional materials. It is primarily required by manufacturers in the dye and pigment, fine chemical, and advanced material research sectors for synthesizing complex molecules.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key precursor in the synthesis of specific red and orange azo dyes used in textiles, inks, and plastics.
• Fine Chemical Synthesis: Serves as a versatile building block for creating complex organic molecules in pharmaceutical and agrochemical research.
• Functional Material Research: Investigated for use in the development of advanced materials, including light-sensitive polymers and organic semiconductors.
• Analytical Chemistry: Can be utilized as a reagent or standard in chromatographic analysis and method development.
• Laboratory Research: Employed in academic and industrial R&D for studying azo coupling reactions and sulfonic acid chemistry.

Basic Information

Product Name	4-[(1-Hydroxy-4-Naphtyl)Azo]Benzenesulfonic Acid
CAS No.	574-69-6
Molecular Formula	C₁₆H₁₂N₂O₄S
Molecular Weight	328.34 g/mol
Synonyms	4-[(1-Hydroxy-4-naphthyl)azo]benzenesulfonic acid; 1-(4-Sulfophenylazo)-2-naphthol; C.I. 15865; Acid Orange 20 intermediate; Benzenesulfonic acid, 4-[(1-hydroxy-4-naphthalenyl)azo]-; 1-(p-Sulfophenylazo)-2-naphthol; 4-(1-Hydroxy-4-naphthylazo)benzenesulfonic acid
EINECS	209-377-4

Quality Control

Our 4-[(1-Hydroxy-4-Naphtyl)Azo]Benzenesulfonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for research and industrial use. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to red-brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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