Description

4-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]Naphthalenesulphonic Acid is a specialized azo dye intermediate known for its complex aromatic structure and functional sulfonic acid groups. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color fastness and solubility properties. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid dyes and direct dyes used for coloring nylon, wool, silk, and paper.
• Textile Industry: Used in the production of dyes that provide strong, wash-fast colors on natural and synthetic fibers.
• Ink Manufacturing: Serves as a precursor for pigments in printing inks, especially where water solubility and color intensity are critical.
• Leather Dyeing: Employed in the formulation of dyes for leather products to achieve deep, uniform shades.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.
• Specialty Chemicals: Acts as a functional intermediate for creating complex molecules with specific optical or chemical properties.

Basic Information

Item	Details
Product Name	4-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]Naphthalenesulphonic Acid
CAS No.	85455-47-6
Molecular Formula	C26H17N3O7S2
Molecular Weight	547.56 g/mol
Synonyms	Acid Black 210; C.I. 28440; 1-Naphthalenesulfonic acid, 4-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-; 4-[(1-Hydroxy-6-anilino-3-sulfo-2-naphthyl)azo]naphthalene-1-sulfonic acid; 4-[(1-Hydroxy-6-phenylamino-3-sulpho-2-naphthyl)azo]-1-naphthalenesulphonic acid; Azo dye intermediate 85455-47-6
EINECS	Contact for details

Quality Control

Our production of 4-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]Naphthalenesulphonic Acid adheres to stringent quality protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color value, and chemical identity. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical specifications are available upon request to support your quality assurance processes.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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