Description

4-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-3-Hydroxy-7-Nitronaphthalene-1-Sulphonic Acid is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulphonic acid groups and an azo linkage, provides excellent water solubility and strong chromophoric properties, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to produce vivid, wash-fast, and light-stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes for coloring polyamide fibers (nylon), wool, and silk.
• Leather Dyeing: Used in the formulation of dyes for leather products, providing deep, uniform shades with good adhesion.
• Ink Manufacturing: A valuable component in the production of specialty inks, including those for packaging and security printing applications.
• Paper Coloring: Employed in the paper industry to create colored papers and boards with specific hue requirements.
• Research & Development: Utilized in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry and properties.
• Analytical Reagent: Can function as a complexometric indicator or a staining agent in specific analytical and histochemical procedures.

Basic Information

Product Name	4-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-3-Hydroxy-7-Nitronaphthalene-1-Sulphonic Acid
CAS No.	117-69-1
Molecular Formula	C20H14N4O10S2
Molecular Weight	534.47 g/mol
Synonyms	Acid Black 24; C.I. 26370; 4-[(6-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-3-hydroxy-7-nitronaphthalene-1-sulfonic acid; 7-Nitro-4-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-3-hydroxynaphthalene-1-sulfonic acid; 1-Naphthalenesulfonic acid, 4-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-3-hydroxy-7-nitro-; Amanil Fast Black L; Atul Acid Fast Black L
EINECS	204-207-4

Quality Control

Our production of 4-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-3-Hydroxy-7-Nitronaphthalene-1-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing all critical parameters are provided with each shipment to guarantee traceability and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent absorption of atmospheric moisture.

Specification

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

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