Description

5-[[4-[(7-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-1-Naphthyl]Azo]Salicylic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and functional groups, makes it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce vivid, stable colors. Its consistent quality and reliable performance are key for ensuring batch-to-batch reproducibility in demanding industrial applications.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance, polyazo direct and acid dyes for textiles like cotton, wool, and nylon.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for applications requiring high color strength and durability.
• Inkjet and Digital Printing Inks: Employed in the formulation of advanced colorants for high-quality photographic and graphic arts inks.
• Biological Staining Reagents: Potential use as a precursor for developing histological stains and indicators in laboratory settings.
• Research & Development: Utilized in chemical research for studying azo coupling reactions and developing novel chromophores.
• Functional Material Synthesis: May be incorporated into polymers or coatings to impart specific optical or chemical properties.

Basic Information

Item	Details
Product Name	5-[[4-[(7-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-1-Naphthyl]Azo]Salicylic Acid, Sodium Salt
CAS No.	83221-53-8
Molecular Formula	C27H18N5NaO7S
Molecular Weight	603.52 g/mol
Synonyms	Acid Black 210; C.I. 28440; Sodium 5-[(4-[(7-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-1-naphthyl)azo]salicylate; 7-Amino-1-hydroxy-3-sulfo-2-naphthaleneazo-1-naphthaleneazo-5-salicylic acid sodium salt; Azo Dye Intermediate 83221-53-8; 5-[(4-[(7-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-1-naphthyl)azo]-2-hydroxybenzoic acid sodium salt
EINECS	Contact for details

Quality Control

Our production of 5-[[4-[(7-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-1-Naphthyl]Azo]Salicylic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry specifications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. Our commitment to consistent quality and traceability supports your supply chain reliability and product development needs.

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 when not in use to prevent absorption of atmospheric moisture, which can affect product stability and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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