Description

2-[4-[1,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-4H-Pyrazol-4-Ylidene]But-2-Enylidene]-3-Ethyl-2,3-Dihydrobenzoxazole-5-Sulphonic Acid is a high-purity, sulfonated heterocyclic compound valued for its role as a key intermediate in the synthesis of advanced functional dyes and pigments. Its complex molecular structure provides excellent chromophoric properties and water solubility, making it indispensable for creating vivid and stable colorants. This chemical is primarily sought by manufacturers in the specialty dyes, textile printing, and high-performance inkjet ink industries who require precise and reliable intermediates for their formulations.

Application

This specialized chemical intermediate serves critical functions in several advanced manufacturing sectors:

• Reactive Dye Synthesis: A crucial building block for producing high-quality, water-soluble reactive dyes used in textile dyeing and printing.
• Inkjet Ink Formulations: Used in the manufacture of professional and industrial-grade inkjet inks, contributing to color strength, stability, and nozzle performance.
• Functional Pigment Production: Acts as an intermediate in the synthesis of complex organic pigments for plastics, coatings, and specialty paints.
• Photographic and Imaging Chemicals: Employed in the production of light-sensitive materials and color couplers for specialized imaging applications.
• Research & Development: Serves as a valuable reference standard and starting material in organic synthesis and material science research for novel chromophores.

Basic Information

Product Name	2-[4-[1,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-4H-Pyrazol-4-Ylidene]But-2-Enylidene]-3-Ethyl-2,3-Dihydrobenzoxazole-5-Sulphonic Acid
CAS No.	72269-63-7
Molecular Formula	C23H21N3O7S2
Molecular Weight	515.56 g/mol
Synonyms	Acid Yellow 219 (C.I. 560150); 2-[4-[(E)-[1,5-Dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-4H-pyrazol-4-ylidene]but-2-en-2-ylidene]-3-ethyl-2,3-dihydro-1,3-benzoxazol-5-yl]sulfonic acid; 3-Ethyl-2-[4-[(E)-[3-methyl-5-oxo-1-(4-sulfophenyl)-1,5-dihydro-4H-pyrazol-4-ylidene]but-2-en-2-ylidene]-2,3-dihydro-1,3-benzoxazol-5-yl]sulfonic acid; Pyrazolone benzoxazole sulfonic acid derivative; Reactive yellow dye intermediate; C.I. Acid Yellow 219 intermediate
EINECS	Contact for details

Quality Control

Our production of 2-[4-[1,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-4H-Pyrazol-4-Ylidene]But-2-Enylidene]-3-Ethyl-2,3-Dihydrobenzoxazole-5-Sulphonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability for your critical synthesis processes. Certificates of Analysis (COA) detailing all specification 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 room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which may affect product stability and performance.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
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.