Description

4-Hydroxy-5-[(2-Hydroxy-1-Naphthyl)Azo]-3-[(2-Hydroxy-3-Nitro-5-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, complex azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart specific color properties and functional characteristics in advanced material formulations. It is primarily sought after by manufacturers in the textile dyeing, specialty ink, and advanced pigment industries who require consistent quality and reliable supply for their production processes.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-performance, wash-fast azo dyes for natural and synthetic fibers.
• Specialty Inks: Used in the formulation of industrial and security inks requiring specific chromatic and stability properties.
• Advanced Pigments: Serves as a precursor for manufacturing complex organic pigments used in plastics, coatings, and masterbatches.
• Research & Development: Employed in chemical research for developing new colorants and studying azo compound chemistry.
• Analytical Chemistry: Potential use as a colorimetric reagent or indicator in specific analytical methods.
• Functional Materials: Exploration in materials science for applications in light-sensitive or optoelectronic devices.

Basic Information

Product Name	4-Hydroxy-5-[(2-Hydroxy-1-Naphthyl)Azo]-3-[(2-Hydroxy-3-Nitro-5-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	93940-13-7
Molecular Formula	C27H15N4Na3O14S3
Molecular Weight	~800.6 g/mol (as sodium salt)
Synonyms	Acid Black 210 (C.I. 300310); Sodium 4-hydroxy-5-[(2-hydroxy-1-naphthyl)azo]-3-[(2-hydroxy-3-nitro-5-sulfophenyl)azo]naphthalene-2,7-disulfonate; C.I. 300310; Trisodium 4-hydroxy-3,5-bis[(2-hydroxynaphthalen-1-yl)diazenyl]-6-(3-nitro-4-sulfophenoxy)naphthalene-2,7-disulfonate; Azo Dye Intermediate 93940-13-7; 1-Naphthalenesulfonic acid, 4-hydroxy-3,5-bis[(2-hydroxynaphthalen-1-yl)azo]-6-(3-nitro-4-sulfophenoxy)-, trisodium salt; Acid Black 210 sodium salt.
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical testing including HPLC, UV-Vis spectroscopy, and titration methods. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	Contact for details
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.