Description

Disodium 5-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its complex polyazo structure and excellent chromophoric properties. This compound is valued for its ability to impart vivid and stable coloration, making it a critical component in the production of specialized dyes and pigments. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking consistent, high-performance colorants.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-grade, wash-fast azo dyes for natural and synthetic fibers.
• Ink Formulation: Used in the production of industrial and specialty printing inks requiring intense color strength and stability.
• Pigment Manufacturing: Serves as a precursor for creating organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Applied in the manufacture of dyes for specialty and decorative papers.
• Research & Development: Used as a standard or reagent in chemical research and analytical laboratories for dye chemistry studies.

Basic Information

Product Name	Disodium 5-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	70210-24-1
Molecular Formula	C34H20N8Na2O14S2
Molecular Weight	882.69 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 5-[(2,4-dihydroxy-5-[(4-nitrophenyl)azo]phenyl)azo]-4-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 5-[[2,4-dihydroxy-5-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-, disodium salt; Polyazo dye intermediate; Azo Black 210; Acid Dye Black 210
EINECS	Contact for details

Quality Control

Our production of Disodium 5-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and spectrophotometry for color strength, to ensure consistent performance and batch-to-batch reproducibility. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each shipment 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 a controlled room temperature (15-25°C). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, the container should be opaque or stored in darkness to prevent degradation.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Ash Content (Sulfated)	≤ 20.0%
Water Solubility	Freely soluble

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