Description

4-Hydroxy-7-Phenylamino-3-[[5-Methyl-4-[(4-Methyl-2-Sodiosulfophenyl)Azo]-2-Methoxyphenyl]Azo]Naphthalene-2-Sulfonic Acid Sodium Salt is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its complex molecular structure is engineered to deliver exceptional color strength and stability in demanding applications. This compound is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance, water-soluble azo dyes for textiles (cotton, silk, nylon).
• Inkjet and Printing Inks: Used in the formulation of inks requiring excellent color fidelity, lightfastness, and solubility.
• Industrial Coatings and Paints: Imparts stable coloration to coatings where chemical and UV resistance are critical.
• Paper Coloring: Employed in specialty paper dyeing processes.
• Biological Staining Reagents: Potential use as a precursor for developing histological or cytological stains in laboratory settings.
• Research & Development: Serves as a valuable chemical entity for academic and industrial research into new chromophores and functional materials.

Basic Information

Product Name	4-Hydroxy-7-Phenylamino-3-[[5-Methyl-4-[(4-Methyl-2-Sodiosulfophenyl)Azo]-2-Methoxyphenyl]Azo]Naphthalene-2-Sulfonic Acid Sodium Salt
CAS No.	6227-17-4
Molecular Formula	C31H24N5Na2O8S2
Molecular Weight	728.66 g/mol
Synonyms	Acid Red 337; C.I. 17215; 2-Naphthalenesulfonic acid, 4-hydroxy-7-(phenylamino)-3-[[5-methyl-4-[(4-methyl-2-sulfophenyl)azo]-2-methoxyphenyl]azo]-, disodium salt; 7-Anilino-4-hydroxy-3-[[5-methyl-4-[(4-methyl-2-sulfophenyl)azo]-2-methoxyphenyl]azo]naphthalene-2-sulfonic acid disodium salt; Sodium 4-hydroxy-7-(phenylamino)-3-[[5-methyl-4-[(4-methyl-2-sulfophenyl)azo]-2-methoxyphenyl]azo]naphthalene-2-sulfonate; Azo dye intermediate 6227-17-4
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify critical parameters. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles 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, well-ventilated area at room temperature (15-25°C). This material is moisture-sensitive; keep the container tightly sealed to prevent absorption of atmospheric humidity.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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