Description

4-Hydroxy-3-[[5-Methyl-2-Methoxy-4-[(4-Nitro-2-Sodiosulfophenyl)Azo]Phenyl]Azo]-7-(Phenylamino)Naphthalene-2-Sulfonic Acid Sodium Salt is a high-purity, synthetic azo dye intermediate of significant commercial importance. This compound is valued for its precise chromophoric structure, which is critical for producing vivid and stable colorants. It is primarily required by manufacturers in the textile, ink, and specialty pigment industries for the synthesis of high-performance dyes.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of complex, high-value azo dyes for textiles and fabrics.
• Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics, where color fastness is essential.
• Specialty Colorants: Employed in the formulation of specialized dyes for leather, paper, and other industrial materials.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying dye-sensitized processes.
• Analytical Reagents: Can be used as a standard or reagent in analytical chemistry for colorimetric assays and detection methods.

Basic Information

Product Name	4-Hydroxy-3-[[5-Methyl-2-Methoxy-4-[(4-Nitro-2-Sodiosulfophenyl)Azo]Phenyl]Azo]-7-(Phenylamino)Naphthalene-2-Sulfonic Acid Sodium Salt
CAS No.	6227-15-2
Molecular Formula	C30H22N6Na2O11S2
Molecular Weight	768.70 g/mol
Synonyms	Acid Red 337; C.I. 17210; Sodium 4-hydroxy-3-{[5-methyl-2-methoxy-4-[(4-nitro-2-sulfonatophenyl)diazenyl]phenyl]diazenyl}-7-(phenylamino)naphthalene-2-sulfonate; 7-(Phenylamino)-4-hydroxy-3-{[5-methyl-2-methoxy-4-[(4-nitro-2-sulfonatophenyl)diazenyl]phenyl]diazenyl}naphthalene-2-sulfonic acid disodium salt; Azo dye intermediate 6227-15-2; C.I. Acid Red 337; Disodium 4-hydroxy-3-{[5-methyl-2-methoxy-4-[(4-nitro-2-sulfonatophenyl)diazenyl]phenyl]diazenyl}-7-anilino-2-naphthalenesulfonate
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[5-Methyl-2-Methoxy-4-[(4-Nitro-2-Sodiosulfophenyl)Azo]Phenyl]Azo]-7-(Phenylamino)Naphthalene-2-Sulfonic Acid Sodium Salt adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

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.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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