Description

7-Amino-4-Hydroxy-3-[[4-(1-Naphthylazo)-7-Sulpho-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate with the CAS registry number 75627-22-4. This compound is valued for its ability to impart specific color properties and act as a key building block in the synthesis of complex dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical precursor in the synthesis of high-performance, polyazo dyes for textiles and leather.
• Specialty Ink Formulation: Used in the production of inks for jet printing, packaging, and security applications requiring specific chromaticity.
• Pigment Manufacturing: Acts as a key component in the creation of organic pigments with enhanced lightfastness and thermal stability.
• Research & Development: Employed in chemical R&D for developing new colorants and studying azo coupling reactions.
• Analytical Chemistry: Can be utilized as a chromogenic reagent or a standard in analytical methods.

Basic Information

Product Name	7-Amino-4-Hydroxy-3-[[4-(1-Naphthylazo)-7-Sulpho-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	75627-22-4
Molecular Formula	C30H19N5O7S2•Na
Molecular Weight	664.62 g/mol
Synonyms	Acid Black 210; C.I. 300310; Sodium 7-amino-4-hydroxy-3-{[4-[(1-naphthyl)diazenyl]-7-sulfonaphthalen-1-yl]diazenyl}naphthalene-2-sulfonate; 1-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((4-((1-naphthalenyl)azo)-7-sulfo-1-naphthalenyl)azo)-, monosodium salt; Azo dye intermediate 75627-22-4
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive dye synthesis. A Certificate of Analysis (COA) detailing batch-specific results is provided with each shipment to guarantee traceability and consistency.

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 nature, the container must be kept sealed to minimize exposure to 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	≤ 20.0%
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.