Description

4,5-Dihydroxy-3-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-6-[(3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid is a high-purity, complex azo dye intermediate of significant industrial importance. This compound is valued for its precise molecular structure, which is critical for synthesizing specialized dyes and pigments with specific colorimetric properties. It is primarily sought by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of complex, high-value azo dyes, particularly for textile and leather coloring.
• Specialty Ink Formulation: Used in the production of inks for high-resolution printing, security inks, and other advanced marking applications.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Reagent: Can function as a complexometric indicator or a reagent in specific analytical chemistry methodologies.
• Functional Material Synthesis: Potential use as a precursor in the development of organic semiconductors or light-absorbing materials for niche applications.

Basic Information

Item	Detail
Product Name	4,5-Dihydroxy-3-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-6-[(3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid
CAS No.	14041-33-9
Molecular Formula	C22H13N5O15S3
Molecular Weight	691.56 g/mol
Synonyms	Acid Black 210; C.I. 300310; 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-6-[(3-sulfophenyl)azo]-; 3-[(2-Hydroxy-3,5-dinitrophenyl)azo]-4,5-dihydroxy-6-[(3-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid; C.I. Acid Black 210; Acid Leather Black 210; Dihydroxy dinitro disazo naphthalene trisulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydroxy-3-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-6-[(3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and elemental analysis, to ensure consistency and compliance with customer specifications. A detailed Certificate of Analysis (COA) documenting all critical parameters is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. Due to its complex organic structure, prolonged exposure to elevated temperatures or humidity should be avoided.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Partially soluble, forms a colored solution

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