Description

4-Hydroxy-3-[[2,5-Dimethyl-4-[(4-Sodiosulfophenyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing a range of vibrant and stable dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty colorant industries seeking reliable and consistent raw materials for their production processes.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in the production of dyes for textile fibers, providing a range of colors with good wash and light fastness properties.
• Ink Manufacturing: Employed in the formulation of inks for various printing applications, including packaging and publications.
• Leather Dyeing: Acts as an intermediate for dyes used in the leather tanning and finishing industry.
• Specialty Pigments: Can be utilized in the creation of lakes and pigments for coatings, plastics, and other industrial applications.
• Research & Development: Used in chemical research for developing new chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	4-Hydroxy-3-[[2,5-Dimethyl-4-[(4-Sodiosulfophenyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt
CAS No.	6406-54-8
Molecular Formula	C24H18N4Na2O10S3
Molecular Weight	680.57 g/mol
Synonyms	Acid Red 337; C.I. 17210; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-((2,5-dimethyl-4-((4-sulfophenyl)azo)phenyl)azo)-, disodium salt; Disodium 4-hydroxy-3-((2,5-dimethyl-4-((4-sulfonatophenyl)diazenyl)phenyl)diazenyl)naphthalene-2,7-disulfonate; 6406-54-8; C.I. Acid Red 337; Azo dye intermediate 6406-54-8
EINECS	229-077-2

Quality Control

Our production of 4-Hydroxy-3-[[2,5-Dimethyl-4-[(4-Sodiosulfophenyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and consistency for our global B2B clients.

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 properties.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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