Description

4-Hydroxy-3-(p-Nitrophenylazo)-5-[2,4-Dihydroxy-3,5-Bis(p-Nitrophenylazo)Phenylazo]-2,7-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, complex azo dye intermediate of significant commercial importance. Its intricate molecular structure, featuring multiple azo and nitro groups, makes it a critical precursor for synthesizing specialized dyes and pigments with specific coloristic and fastness properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop advanced colorants for demanding applications.

Application

• Primary Intermediate for Complex Azo Dyes: Serves as a key building block in the synthesis of high-performance, polyazo dyes for textiles, leather, and paper.
• Specialty Pigment Manufacturing: Used in the production of organic pigments with enhanced lightfastness and thermal stability for inks and coatings.
• Research & Development: A valuable compound for academic and industrial R&D focused on novel chromophores, dye-sensitized solar cells (DSSCs), and functional materials.
• Analytical Chemistry Reagent: Can be employed as a colorimetric reagent or a standard in analytical methods due to its distinct chromophoric properties.
• Functional Dye Synthesis: Potential use in creating dyes for non-textile applications, such as in optical data storage or as biological stains.

Basic Information

Product Name	4-Hydroxy-3-(p-Nitrophenylazo)-5-[2,4-Dihydroxy-3,5-Bis(p-Nitrophenylazo)Phenylazo]-2,7-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	72894-25-8
Molecular Formula	C34H20N10O14S2 · 2Na
Molecular Weight	938.73 g/mol (Disodium Salt)
Synonyms	Acid Black 210 (C.I. 300310); 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(4-nitrophenyl)azo]-5-[[2,4-dihydroxy-3,5-bis[(4-nitrophenyl)azo]phenyl]azo]-, disodium salt; C.I. 300310; Polyazo dye intermediate; Disodium 4-hydroxy-3-[(E)-2-(4-nitrophenyl)diazen-1-yl]-5-[(E)-2-[2,4-dihydroxy-3,5-bis[(E)-2-(4-nitrophenyl)diazen-1-yl]phenyl]diazen-1-yl]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-(p-Nitrophenylazo)-5-[2,4-Dihydroxy-3,5-Bis(p-Nitrophenylazo)Phenylazo]-2,7-Naphthalenedisulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) detailing all critical parameters are provided with each shipment.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95% (Typical 97-99%)
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water, alkaline solutions; slightly soluble in most organic solvents

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