Description

Disodium 3,3'-[Iminobis(4,1-Phenyleneazo)]Bis[5-(Benzoylamino)-4-Hydroxynaphthalene-2,7-Disulphonate] is a high-purity, complex disodium salt azo dye intermediate of significant industrial importance. Its value lies in its role as a critical precursor for synthesizing high-performance dyes and pigments, particularly those requiring excellent lightfastness and thermal stability. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop advanced colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-grade, complex azo dyes used in textile coloring.
• Textile Industry: Used in the production of dyes for dyeing and printing natural and synthetic fibers, valued for color depth and wash-fastness.
• Ink Manufacturing: Employed in the formulation of specialty printing inks, including those for packaging and security applications.
• Industrial Coatings & Paints: Acts as a pigment precursor for coatings that require specific color properties and durability.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Specialty Chemical Synthesis: Functions as an intermediate in the synthesis of other functional chemicals where the disulphonated azo structure is required.

Basic Information

Product Name	Disodium 3,3'-[Iminobis(4,1-Phenyleneazo)]Bis[5-(Benzoylamino)-4-Hydroxynaphthalene-2,7-Disulphonate]
CAS No.	85223-30-9
Molecular Formula	C52H34N8Na2O16S4
Molecular Weight	1185.13 g/mol
Synonyms	Disodium 3,3'-[iminobis(4,1-phenylenebis(azo)]bis[5-(benzoylamino)-4-hydroxy-2,7-naphthalenedisulfonate]; C.I. Direct Brown 223; Direct Brown 223; Direct Brown 223, disodium salt; 3,3'-[Iminobis(4,1-phenylenebis(azo)]bis[5-(benzoylamino)-4-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt; Direct Fast Brown BRL; Direct Fast Brown BRS; Amanil Fast Brown BRL
EINECS	Contact for details

Quality Control

Our production of Disodium 3,3'-[Iminobis(4,1-Phenyleneazo)]Bis[5-(Benzoylamino)-4-Hydroxynaphthalene-2,7-Disulphonate] adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity, spectrophotometry for color strength, and comprehensive identification tests, to ensure consistency and compliance with customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark Brown to Black Powder or Granules
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely Soluble

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