Description

4-[(4,8-Disulpho-2-Naphthyl)Azo]-3-Hydroxy-2-Naphthoic Acid CAS NO 84030-35-3 is a high-purity, sulfonated azo dye intermediate characterized by its distinct chemical structure. This compound is valued for its ability to impart specific color properties and act as a versatile building block in advanced synthesis. It is primarily sought after by manufacturers in the dye and pigment industries, as well as research institutions developing specialized functional materials.

Application

• Primary Intermediate for Acid Dyes: A key precursor in the synthesis of high-quality, water-soluble acid dyes used for coloring nylon, silk, wool, and leather.
• Pigment Manufacturing: Used in the production of lake pigments and other colorants requiring sulfonic acid groups for solubility and application properties.
• Research & Development: Serves as a critical reagent in chemical research for developing new azo compounds with specific optical or electronic characteristics.
• Textile Industry: Integral to creating specialized dye formulations that offer excellent fastness properties on protein and polyamide fibers.
• Analytical Chemistry: Can be utilized as a complexometric agent or a chromogenic reagent in certain analytical methodologies.
• Functional Material Synthesis: Explored for use in creating advanced materials where its conjugated system and functional groups are beneficial.

Basic Information

Product Name	4-[(4,8-Disulpho-2-Naphthyl)Azo]-3-Hydroxy-2-Naphthoic Acid
CAS No.	84030-35-3
Molecular Formula	C21H12N2O9S2
Molecular Weight	500.46 g/mol
Synonyms	3-Hydroxy-4-[(4,8-disulfo-2-naphthyl)azo]-2-naphthoic acid; C.I. 15865; Acid Red 299; 4-[(4,8-Disulfo-2-naphthyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid; 2-Naphthalenecarboxylic acid, 4-[(4,8-disulfo-2-naphthyl)azo]-3-hydroxy-; 3-Hydroxy-4-[(4,8-disulpho-2-naphthyl)azo]-2-naphthoic acid; 4-[(4,8-Disulfo-2-naphthalenyl)azo]-3-hydroxy-2-naphthoic acid
EINECS	Contact for details

Quality Control

Our production of 4-[(4,8-Disulpho-2-Naphthyl)Azo]-3-Hydroxy-2-Naphthoic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. Certificates of Analysis (COA) detailing key specifications such as assay, sulfonic acid content, and impurity profile 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 acids and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Sulfonic Acid Content	Contact for details
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.