Description

Disodium 5-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its complex polyazo structure. This compound is critical for producing intense and stable colorants, offering superior lightfastness and chemical resistance in demanding applications. It is primarily required by manufacturers in the textile, ink, and specialty polymer industries seeking advanced chromophores for high-performance products.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-grade, wash-fast azo dyes for synthetic fibers like polyester and nylon.
• Ink Manufacturing: Used in the production of pigments for industrial inks, including packaging and textile printing inks, where color strength and stability are paramount.
• Plastics and Polymers: Employed as a colorant intermediate for engineering plastics and masterbatches that require specific hue and thermal stability.
• Research & Development: Serves as a valuable chemical reagent in academic and industrial R&D for developing novel dyes and functional materials.
• Specialty Coatings: Utilized in formulating coatings for automotive or industrial applications that demand durable and vivid coloration.
• Analytical Chemistry: Can be used as a complexometric indicator or a standard in chromatographic analysis due to its distinct structure.

Basic Information

Product Name	Disodium 5-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	68155-63-5
Molecular Formula	C34H18N8Na2O17S2
Molecular Weight	936.71 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-hydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-5-[[2-hydroxy-5-[(4-nitrophenyl)azo]phenyl]azo]naphthalene-2,7-disulphonate; Polyazo Black Dye Intermediate; 5-[[2,4-Dihydroxy-5-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 5-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) documenting key parameters are available upon request, providing full traceability and compliance assurance for your supply chain.

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). This product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Partially soluble, forms colloidal solution

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