Description

Sodium 3-[[5-[(Diethylamino)Sulphonyl]-2-Methoxyphenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate is a high-purity synthetic organic dye and azo compound, valued for its specific chromophoric properties and consistent performance. This chemical is critical for industries requiring precise colorants and analytical reagents with reliable batch-to-batch uniformity. It is primarily sought by manufacturers in the textile dyeing, specialty ink formulation, and research chemical sectors.

Application

• Textile Dyeing Agent: Used as a key intermediate or direct dye for coloring natural and synthetic fibers, particularly for achieving specific shades in polyamide and wool.
• Specialty Ink Formulation: Serves as a colorant component in the production of inks for non-impact printing, security inks, and other high-performance applications.
• Biological Staining Reagent: Employed in histological and cytological staining procedures in life science research and diagnostic laboratories.
• Analytical Chemistry Indicator: Functions as a pH indicator or a complexometric agent in various titrimetric and spectrophotometric analysis methods.
• Industrial Colorant: Applied in the coloration of paper, leather, and other specialty materials where a specific azo dye structure is required.
• Chemical Intermediate: Utilized in organic synthesis for the preparation of more complex dye molecules and functional chemicals.

Basic Information

Product Name	Sodium 3-[[5-[(Diethylamino)Sulphonyl]-2-Methoxyphenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate
CAS No.	85721-12-6
Molecular Formula	C21H21N3NaO7S2
Molecular Weight	514.52 g/mol
Synonyms	C.I. Acid Red 337; Sodium 4-hydroxy-3-[[5-[(diethylamino)sulfonyl]-2-methoxyphenyl]azo]-1-naphthalenesulfonate; Acid Red 337; Azo Rubine S; 3-[[5-[(Diethylamino)sulfonyl]-2-methoxyphenyl]azo]-4-hydroxy-1-naphthalenesulfonic acid sodium salt; 1-Naphthalenesulfonic acid, 3-[[5-[(diethylamino)sulfonyl]-2-methoxyphenyl]azo]-4-hydroxy-, sodium salt; C.I. 17030; Azoic dye intermediate.
EINECS	Contact for details

Quality Control

Our production of Sodium 3-[[5-[(Diethylamino)Sulphonyl]-2-Methoxyphenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for dye content and impurity profiles. Certificates of Analysis (COA) documenting all critical parameters 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, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Dye Content	Min. 85.0%
Moisture (KF)	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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