Description

4-[3-[3-(Ethoxycarbonyl)-5-hydroxy-1-(3-potassiosulfopropyl)-1H-pyrazol-4-yl]-2-propenylidene]-4,5-dihydro-5-oxo-1-(3-potassiosulfopropyl)-1H-pyrazole-3-carboxylic acid ethyl ester is a high-purity, water-soluble reactive dye intermediate of significant commercial importance. Its core value lies in its dual reactive groups, which enable strong covalent bonding with cellulosic fibers like cotton, resulting in exceptional wash and light fastness. This compound is primarily needed by manufacturers in the textile and specialty chemical industries for the synthesis of high-performance reactive dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing bifunctional reactive dyes, particularly for cotton, viscose, and other cellulosic fabrics.
• Textile Dyeing and Printing: Used in the production of dyes that offer brilliant shades, high color yield, and superior fastness properties in exhaust, continuous, and printing applications.
• Specialty Pigments: Serves as a precursor for creating specialized pigments used in inks, coatings, and plastics where enhanced stability is required.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Functional Dyes: Potential use in the synthesis of dyes for non-textile applications, such as sensors or light-harvesting materials.

Basic Information

Product Name	4-[3-[3-(Ethoxycarbonyl)-5-hydroxy-1-(3-potassiosulfopropyl)-1H-pyrazol-4-yl]-2-propenylidene]-4,5-dihydro-5-oxo-1-(3-potassiosulfopropyl)-1H-pyrazole-3-carboxylic acid ethyl ester
CAS No.	53812-38-7
Molecular Formula	C23H28K2N4O13S2
Molecular Weight	734.88 g/mol
Synonyms	Reactive Dye Intermediate 53812-38-7; Bis(3-sulfopropyl) Pyrazolone Derivative; Potassium 4,4'-(1E)-1,2-Ethenediylbis[5-hydroxy-1-(3-sulfopropyl)-1H-pyrazole-3-carboxylate]; C.I. Reactive Yellow 176 Intermediate; Azo Pyrazolone Reactive Intermediate; Ethyl 4,4'-(1E)-1,2-ethenediylbis[5-hydroxy-1-(3-sulfopropyl)-1H-pyrazole-3-carboxylate] Dipotassium Salt; 1H-Pyrazole-3-carboxylic acid, 4,4'-(1E)-1,2-ethenediylbis[5-hydroxy-1-(3-sulfopropyl)-, diethyl ester, potassium salt (1:2)
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Each lot is analyzed using advanced techniques like HPLC and NMR to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment, ensuring full traceability and compliance with customer and industry requirements.

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 material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Clear, yellow 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.