Description

5-Hydroxy-4-(Phenylamino)Naphthalenesulphonic Acid is a specialized organic intermediate of significant importance in the synthesis of high-value dyes and pigments. Its unique molecular structure, featuring both a naphthalene core and a phenylamino substituent, makes it a critical precursor for creating compounds with specific color and light-fastness properties. This chemical is essential for manufacturers and R&D laboratories in the dyestuff, textile, and specialty chemical industries seeking to develop or produce advanced colorants.

Application

• Primary Intermediate for Dyes & Pigments: Serves as a key building block in the synthesis of azo dyes, acid dyes, and other complex organic pigments.
• Textile Industry: Used in the production of dyes for coloring natural and synthetic fibers, including wool, silk, and nylon.
• Research & Development: Employed in chemical research for developing novel chromophores and functional materials with specific optical properties.
• Specialty Chemical Synthesis: Acts as a precursor for other sulfonated aromatic compounds used in various industrial applications.
• Analytical Chemistry: May be used as a reagent or standard in analytical methods due to its distinct chemical signature.

Basic Information

Product Name	5-Hydroxy-4-(Phenylamino)Naphthalenesulphonic Acid
CAS No.	68003-37-2
Molecular Formula	C₁₆H₁₃NO₄S
Molecular Weight	315.34 g/mol
Synonyms	4-Anilino-5-hydroxynaphthalene-1-sulfonic acid; 5-Hydroxy-4-(phenylamino)-1-naphthalenesulfonic acid; 1-Naphthalenesulfonic acid, 4-(phenylamino)-5-hydroxy-; 4-Phenylamino-5-hydroxy-1-naphthalenesulfonic acid; C.I. 60725; Acid Blue 92 intermediate
EINECS	Contact for details

Quality Control

Our 5-Hydroxy-4-(Phenylamino)Naphthalenesulphonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with key parameters such as assay (HPLC), loss on drying, and residue on ignition. Our quality commitment ensures the material meets the stringent requirements for use as a fine chemical intermediate.

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 acids and organic solvents. The container must be kept tightly closed to protect from moisture and contamination.

Specification

Item	Specification
Appearance	Light brown to brown powder
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.