Description

8-Anilino-5-(4-Hydroxyanilino)Naphthalenesulphonic Acid is a specialized naphthalene-based sulfonic acid derivative, valued for its role as a key intermediate in the synthesis of advanced colorants and functional materials. Its molecular structure, featuring both anilino and hydroxyanilino substituents, makes it a versatile building block for creating compounds with specific optical and chemical properties. This product is essential for manufacturers and R&D laboratories in the dyes and pigments, specialty chemicals, and advanced material research sectors.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of azo dyes, acid dyes, and other complex colorants.
• Functional Material Synthesis: Used in the development of organic semiconductors, photoconductive materials, and nonlinear optical (NLO) materials.
• Analytical Chemistry Reagent: Serves as a chromogenic agent or a complexing agent in specific spectrophotometric analyses.
• Biochemical Research: Potential use as a staining agent or probe in histological and cytological studies due to its aromatic structure.
• Polymer Additive: Can be incorporated as a monomer or modifier to impart specific properties like UV absorption or ionic character to polymers.
• Liquid Crystal Materials: Used in the research and development of certain types of liquid crystal compounds.

Basic Information

Item	Details
Product Name	8-Anilino-5-(4-Hydroxyanilino)Naphthalenesulphonic Acid
CAS No.	82-31-5
Molecular Formula	C22H18N2O4S
Molecular Weight	406.45 g/mol
Synonyms	8-Anilino-5-(4-hydroxyanilino)naphthalene-1-sulfonic acid; 1-Naphthalenesulfonic acid, 8-anilino-5-[(4-hydroxyphenyl)amino]-; Acid Black 48; C.I. 65005; 8-Anilino-5-(p-hydroxyanilino)naphthalene-1-sulfonic acid; Naphthalene Black 12B; 8-Phenylamino-5-(4-hydroxyphenylamino)naphthalene-1-sulfonic acid
EINECS	201-411-8

Quality Control

Our 8-Anilino-5-(4-Hydroxyanilino)Naphthalenesulphonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, which includes data from HPLC, IR spectroscopy, and other relevant tests. Our quality commitment ensures the material meets the exacting standards required for fine chemical synthesis and research applications.

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 incompatible materials such as strong oxidizing agents. The compound is light-sensitive; prolonged exposure to light should be avoided to prevent degradation.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in alkaline aqueous solutions and select polar organic solvents

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