Description

8-(4-Methylanilino)-1-Naphthol-5-Sulfonic Acid is a specialized organic intermediate featuring a naphthol sulfonic acid core substituted with a p-toluidine group. This compound matters as a key building block in the synthesis of dyes, pigments, and functional materials, offering a unique combination of chromophoric and hydrophilic properties. It is primarily needed by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced organic electronic materials and chemical sensors.

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of azo dyes, acid dyes, and solvent dyes, imparting color and solubility characteristics.
• Functional Dye Synthesis: Used in the production of dyes for textiles, leather, paper, and inks, where its sulfonic acid group enhances water solubility.
• Chemical Sensor Development: Serves as a ligand or chromogenic component in the research and development of optical chemical sensors and indicators.
• Organic Electronic Materials: Investigated as a potential component in the synthesis of organic semiconductors or charge-transport materials.
• Research & Development: Employed in academic and industrial R&D for novel organic synthesis and the study of structure-property relationships in aromatic compounds.
• Photographic Chemicals: Can be utilized in the formulation of certain specialized photographic chemicals and developers.

Basic Information

Product Name	8-(4-Methylanilino)-1-Naphthol-5-Sulfonic Acid
CAS No.	6357-83-1
Molecular Formula	C₁₇H₁₅NO₄S
Molecular Weight	329.37 g/mol
Synonyms	5-Sulfo-8-(p-toluidino)-1-naphthol; 1-Naphthol-5-sulfonic acid, 8-[(4-methylphenyl)amino]-; 8-(p-Toluidino)-1-naphthol-5-sulfonic acid; N-(4-Methylphenyl)-5-hydroxy-8-naphthalenesulfonamide; C.I. 37515; Acid Black 58 (component); p-Toluidino derivative of 1-naphthol-5-sulfonic acid
EINECS	228-763-6

Quality Control

Our 8-(4-Methylanilino)-1-Naphthol-5-Sulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and compliance with customer specifications. Standard testing includes identification (IR), assay (HPLC), and control of key impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every 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 nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Light brown to grayish powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.