Description

8-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]-5-[[6-Sulpho-4-[(3-Sulphophenyl)Azo]-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, multi-sulfonated azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart strong, vibrant color properties and excellent water solubility in advanced dye formulations. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon fibers.
• Direct Dye Manufacturing: Used in the production of direct dyes, known for their good wash-fastness on cellulosic materials.
• Acid Dye Synthesis: Serves as a crucial component in formulating acid dyes for silk, polyamide, and leather.
• Inkjet Ink Formulations: Employed in the development of specialized inks requiring high color strength and stability.
• Functional Pigment Production: Utilized in creating complex organic pigments for plastics and coatings.
• Research & Development: Acts as a standard or precursor in chemical research for novel chromophores and dye chemistry.

Basic Information

Product Name	8-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]-5-[[6-Sulpho-4-[(3-Sulphophenyl)Azo]-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	72245-52-4
Molecular Formula	C44H26N6Na4O16S4
Molecular Weight	1150.93 g/mol (as Sodium Salt)
Synonyms	Sodium 8-[(1-hydroxy-6-anilino-3-sulfo-2-naphthyl)azo]-5-[(6-sulfo-4-[(3-sulfophenyl)azo]-1-naphthyl)azo]naphthalene-2-sulfonate; C.I. Direct Brown 1:1; Direct Brown 1:1; Direct Brown 1 (sodium salt); 72245-52-4 (CAS); Tetrasodium 8-[(1-hydroxy-6-anilino-3-sulfo-2-naphthyl)azo]-5-[(6-sulfo-4-[(3-sulfophenyl)azo]-1-naphthyl)azo]naphthalene-2-sulfonate; Azo dye intermediate 72245-52-4.
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

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 to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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