Description

Sodium 4-[4-[[3-[(Ethylanilino)Sulphonyl]-4-Methylphenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is a high-purity synthetic organic compound belonging to the azo pyrazolone chemical class, valued for its consistent performance as a specialized dye intermediate. Its precise molecular structure ensures reliable color development and batch-to-batch uniformity, which is critical for producing high-quality, color-fast products. This chemical is essential for manufacturers in the textile, ink, and specialty coatings industries seeking advanced colorant solutions.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Textile Colorant Production: Used in manufacturing dyes for wool, silk, and nylon, offering good light and wash fastness properties.
• Specialty Ink Formulations: Employed in the production of pigments for inks used in packaging, security printing, and digital applications.
• Industrial Coatings: Serves as a colorant component in coatings for plastics, leather, and paper products.
• Liquid Crystal Display (LCD) Color Filters: Potential use as a precision dye in the electronics industry for color filter arrays.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying azo dye chemistry.

Basic Information

Product Name	Sodium 4-[4-[[3-[(Ethylanilino)Sulphonyl]-4-Methylphenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate
CAS No.	72968-72-0
Molecular Formula	C26H24N5NaO7S2
Molecular Weight	605.61 g/mol
Synonyms	Benzenesulfonic acid, 4-[4-[[3-[(ethylphenylamino)sulfonyl]-4-methylphenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-, sodium salt; C.I. Reactive Yellow 145; Reactive Yellow 145; Sodium 1-(4-sulfophenyl)-3-methyl-4-[3-((N-ethylphenylamino)sulfonyl)-4-methylphenyl]azo-5-pyrazolone; 1-(4-Sulfophenyl)-3-methyl-4-[3-((N-ethylphenylamino)sulfonyl)-4-methylphenyl]azo-5-pyrazolone sodium salt; Azo pyrazolone dye intermediate; 72968-72-0
EINECS	Contact for details

Quality Control

Our production of Sodium 4-[4-[[3-[(Ethylanilino)Sulphonyl]-4-Methylphenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate adheres to stringent quality management protocols to ensure high purity and batch-to-batch consistency. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet precise customer specifications. A detailed Certificate of Analysis (COA) documenting identity, purity, and related substances is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (HPLC, Area %)	≥ 98.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, yellow solution

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