Description

2-[3-Ethoxycarbonyl-4-[3-[3-ethoxycarbonyl-5-oxo-1-(2-potassiosulfoethyl)-2-pyrazolin-4-ylidene]-1-propenyl]-5-hydroxy-1H-pyrazol-1-yl]ethane-1-sulfonic acid potassium salt is a high-purity, water-soluble anionic dye intermediate belonging to the pyrazolone chemical class. This compound is valued for its strong chromophoric properties and ability to form stable, vibrant colorants, making it a critical component in the synthesis of specialized dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers.
• Specialty Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and high-grade industrial coatings.
• Functional Dye Synthesis: Serves as a precursor for dyes used in optical applications, such as laser dyes and non-linear optical materials.
• Analytical Chemistry Reagent: Employed as a chromogenic agent or complexometric indicator in specific analytical methods.
• Research & Development: Utilized in academic and industrial R&D for developing novel colorants and studying structure-property relationships.

Basic Information

Product Name	2-[3-Ethoxycarbonyl-4-[3-[3-ethoxycarbonyl-5-oxo-1-(2-potassiosulfoethyl)-2-pyrazolin-4-ylidene]-1-propenyl]-5-hydroxy-1H-pyrazol-1-yl]ethane-1-sulfonic acid potassium salt
CAS No.	51026-41-6
Molecular Formula	C24H27KN4O12S2
Molecular Weight	666.72 g/mol
Synonyms	Potassium 2-[3-ethoxycarbonyl-4-[3-[3-ethoxycarbonyl-5-oxo-1-(2-sulfonatoethyl)-2-pyrazolin-4-ylidene]prop-1-enyl]-5-hydroxy-1H-pyrazol-1-yl]ethanesulfonate; C.I. Reactive Yellow 176 intermediate; Pyrazolone-based disulfonated dye intermediate; 51026-41-6; 2-(3-Ethoxycarbonyl-4-{3-[3-ethoxycarbonyl-5-oxo-1-(2-sulfonatoethyl)-1,2-dihydropyrazol-4-ylidene]prop-1-enyl}-5-hydroxy-1H-pyrazol-1-yl)ethanesulfonic acid potassium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

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). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

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

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