Description

7-Amino-4-Hydroxy-3-[[4-[(2,4-Dimethyl-5-Sodiosulfophenyl)Azo]-5-Methyl-2-Methoxyphenyl]Azo]Naphthalene-2-Sulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its complex disazo structure provides excellent chromophore properties, making it a critical component for achieving specific, high-performance shades in demanding applications. This compound is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking reliable and consistent colorant precursors.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive, acid, and direct dyes for coloring natural and synthetic fibers like cotton, wool, and nylon.
• Ink Formulation: Used in the production of pigments for industrial inks, including those for packaging, printing, and writing instruments.
• Leather Coloring: Serves as a precursor for dyes applied in the leather tanning and finishing industry.
• Paper Coloring: Employed in the manufacture of dyes for specialty papers and paper products.
• Research & Development: Utilized in chemical R&D labs for developing new colorants and studying azo dye chemistry.
• Specialty Coatings: A component in creating colorants for specific coating applications requiring light and wash fastness.

Basic Information

Product Name	7-Amino-4-Hydroxy-3-[[4-[(2,4-Dimethyl-5-Sodiosulfophenyl)Azo]-5-Methyl-2-Methoxyphenyl]Azo]Naphthalene-2-Sulfonic Acid Sodium Salt
CAS No.	6226-98-8
Molecular Formula	C26H23N5Na2O8S2
Molecular Weight	659.60 g/mol
Synonyms	Acid Red 337; C.I. 17210; 7-Amino-4-hydroxy-3-{[4-[(2,4-dimethyl-5-sulfonatophenyl)diazenyl]-5-methyl-2-methoxyphenyl]diazenyl}naphthalene-2-sulfonate; Sodium 7-amino-4-hydroxy-3-{[4-[(2,4-dimethyl-5-sulfonatophenyl)diazenyl]-5-methyl-2-methoxyphenyl]diazenyl}naphthalene-2-sulfonate; Disazo dye intermediate for Acid Red 337
EINECS	Contact for details

Quality Control

Our production of 7-Amino-4-Hydroxy-3-[[4-[(2,4-Dimethyl-5-Sodiosulfophenyl)Azo]-5-Methyl-2-Methoxyphenyl]Azo]Naphthalene-2-Sulfonic Acid Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) documenting batch-specific results are available upon request to support your quality assurance and regulatory 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). This material is light-sensitive and hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent degradation and absorption of moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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