Description

3-[(4-Aminophenyl)Azo]-6-[[4-[(2,4-Diaminophenyl)Azo]-6-Sulpho-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, synthetic azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart deep, vibrant colors and its role in the synthesis of complex, high-performance dyes. It is primarily sought after by manufacturers in the textile, leather, and specialty ink industries who require consistent quality and reliable supply chains for their production processes.

Application

• Textile Dyeing: A key intermediate for synthesizing direct, acid, and reactive dyes used on cotton, wool, silk, and nylon fibers.
• Leather Finishing: Used in the production of dyes for coloring leather goods, providing good penetration and color fastness.
• Ink Manufacturing: Serves as a precursor for pigments and dyes in specialty printing inks, including inks for packaging and security applications.
• Paper Coloring: Employed in the manufacture of dyes for coloring paper products, where specific shade and stability are required.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry and properties.
• Biological Staining: Potential use as an intermediate for histochemical stains in laboratory settings, subject to further purification and certification.

Basic Information

Product Name	3-[(4-Aminophenyl)Azo]-6-[[4-[(2,4-Diaminophenyl)Azo]-6-Sulpho-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83232-41-1
Molecular Formula	C32H22N8O7S2Na2 (or similar, based on structure)
Molecular Weight	Contact for details
Synonyms	Sodium 3-[(4-aminophenyl)azo]-6-[[4-[(2,4-diaminophenyl)azo]-6-sulfo-1-naphthyl]azo]-4-hydroxy-2-naphthalenesulfonate; C.I. Direct Brown 1:1; Direct Brown 1:1; Azo Dye Intermediate Brown 1:1; 4-Hydroxy-3-[(4-aminophenyl)azo]-6-[[4-[(2,4-diaminophenyl)azo]-6-sulfo-1-naphthyl]azo]-2-naphthalenesulfonic acid disodium salt; 83232-41-1 (CAS Index Name); Disodium 4-hydroxy-3-[(E)-2-(4-aminophenyl)diazen-1-yl]-6-[(E)-2-[4-[(E)-2-(2,4-diaminophenyl)diazen-1-yl]-6-sulfonatonaphthalen-1-yl]diazen-1-yl]naphthalene-2-sulfonate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and purity suitable for industrial synthesis. While specific grades can be produced, our standard material is characterized to confirm identity and key parameters. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications 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 room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (Water)	Soluble

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