Description

Dipotassium 4-[2-ethoxycarbonyl-5-hydroxy-4-[5-[3-ethoxycarbonyl-5-oxo-1-(4-sulfonatophenyl)-2-pyrazoline-4-ylidene]-1,3-pentadienyl]-1-pyrazolyl] benzene sulfonate is a high-purity, water-soluble anionic dye intermediate belonging to the pyrazolone class. This compound is valued for its excellent chromophoric properties and stability, making it a critical building block for synthesizing high-performance colorants. It is primarily sought by manufacturers in the specialty dyes and pigments, textile, and ink industries for producing vibrant and durable colors.

Application

• Primary Intermediate for Reactive Dyes: Key precursor 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 plastics, coatings, and inks requiring specific color fastness.
• Functional Dye Synthesis: Building block for creating dyes used in laser printing, optical data storage, and other high-tech applications.
• Textile Colorants: Essential for manufacturing dyes that provide bright shades with good wash and light fastness on textiles.
• Biological Staining Agent Precursor: Potential use in the synthesis of stains for histological and cytological applications in laboratories.
• Research & Development: Serves as a standard or starting material in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Dipotassium 4-[2-ethoxycarbonyl-5-hydroxy-4-[5-[3-ethoxycarbonyl-5-oxo-1-(4-sulfonatophenyl)-2-pyrazoline-4-ylidene]-1,3-pentadienyl]-1-pyrazolyl] benzene sulfonate
CAS No.	53953-04-1
Molecular Formula	C36H30K2N4O12S2
Molecular Weight	852.99 g/mol
Synonyms	Dipotassium 1-(4-sulfophenyl)-4-[5-[3-carbethoxy-5-oxo-1-(4-sulfophenyl)-2-pyrazolin-4-ylidene]-1,3-pentadienyl]-3-carbethoxy-5-hydroxy-1H-pyrazole-4-sulfonate; C.I. Reactive Yellow 42 intermediate; Pyrazolone sulfonate dye intermediate; 53953-04-1; 1H-Pyrazole-4-sulfonic acid, 1-(4-sulfophenyl)-4-[5-[3-(ethoxycarbonyl)-5-oxo-1-(4-sulfophenyl)-2-pyrazolin-4-ylidene]-1,3-pentadienyl]-3-(ethoxycarbonyl)-5-hydroxy-, dipotassium salt
EINECS	Contact for details

Quality Control

Our production of Dipotassium 4-[2-ethoxycarbonyl-5-hydroxy-4-[5-[3-ethoxycarbonyl-5-oxo-1-(4-sulfonatophenyl)-2-pyrazoline-4-ylidene]-1,3-pentadienyl]-1-pyrazolyl] benzene sulfonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and rigorous impurity profiling. We provide a detailed Certificate of Analysis (COA) with each shipment to ensure traceability, consistency, and compliance with your technical specifications.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after use to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	Yellow to Orange-Red Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Color Strength	95 - 105% (vs. Standard)
Water Content (KF)	≤ 5.0%
Solubility (in Water)	Clear Solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total ≤ 3.0%

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