Description

Sodium Hydrogen 4,5-Dihydro-4-[[4-Methyl-3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate is a high-purity, water-soluble azo pyrazolone derivative, valued for its strong chromophoric properties and chemical stability. This compound is engineered to deliver consistent, vibrant color performance and reliable batch-to-batch uniformity for demanding industrial applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking advanced colorant solutions.

Application

• Textile Dyeing: As a key intermediate or direct dye for synthetic fibers, particularly polyamide (nylon) and wool, offering excellent wash and light fastness.
• Inkjet Inks: Used in the formulation of high-performance pigment inks for digital printing, providing sharp color definition and stability.
• Industrial Coatings: Imparts color to various coating systems, including those for plastics, metals, and automotive finishes.
• Paper Coloring: Employed in the production of specialty papers requiring specific, durable hues.
• Liquid Crystal Display (LCD) Color Filters: Serves as a precision colorant in the manufacture of display components.
• Research & Development: Used as a standard or intermediate in chemical synthesis and analytical method development within R&D laboratories.

Basic Information

Product Name	Sodium Hydrogen 4,5-Dihydro-4-[[4-Methyl-3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate
CAS No.	97635-28-4
Molecular Formula	C24H18N5NaO8S2
Molecular Weight	607.55 g/mol
Synonyms	Acid Red 337; C.I. 17200; Sodium 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-methyl-3-[(phenylamino)sulfonyl]phenyl]azo]-1H-pyrazole-3-carboxylate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-[[4-methyl-3-[(phenylamino)sulfonyl]phenyl]azo]-5-oxo-1-(4-sulfophenyl)-, sodium salt; Azo pyrazolone dye; Acid dye for polyamide
EINECS	Contact for details

Quality Control

Our production of Sodium Hydrogen 4,5-Dihydro-4-[[4-Methyl-3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometry for color strength, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
Ash Content	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm

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