Description

4-[3-[3-Carboxy-1-(2,5-dipotassiosulfophenyl)-5-hydroxy-1H-pyrazol-4-yl]-2-propenylidene]-1-(2,5-dipotassiosulfophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid CAS NO 110557-94-3 is a high-purity, water-soluble organic dye intermediate characterized by its complex pyrazole-based structure. This compound is valued for its role as a key precursor in the synthesis of high-performance, reactive dyes and pigments, offering excellent color fastness and stability. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the manufacture of high-quality reactive dyes used for coloring cotton, wool, and other cellulosic fibers.
• Specialty Pigment Synthesis: Used in the production of complex organic pigments for automotive paints, industrial coatings, and plastics requiring superior weatherability.
• Inkjet Ink Formulations: Serves as a precursor for dyes used in high-performance digital printing inks, ensuring broad color gamut and print longevity.
• Functional Dye Manufacturing: Employed in the synthesis of dyes for optical applications, such as laser dyes or sensors, due to its tunable photophysical properties.
• Research & Development: Used in academic and industrial R&D settings for exploring new chromophores and advanced materials chemistry.

Basic Information

Product Name	4-[3-[3-Carboxy-1-(2,5-dipotassiosulfophenyl)-5-hydroxy-1H-pyrazol-4-yl]-2-propenylidene]-1-(2,5-dipotassiosulfophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid
CAS No.	110557-94-3
Molecular Formula	C24H14K4N4O16S4
Molecular Weight	956.44 g/mol
Synonyms	1H-Pyrazole-3-carboxylic acid, 4-[[3-[3-carboxy-1-(2,5-disulfophenyl)-5-hydroxy-1H-pyrazol-4-yl]-2-propenylidene]-1-(2,5-disulfophenyl)-4,5-dihydro-5-oxo-, potassium salt (1:4); Reactive Dye Intermediate; Tetrapotassium 4,4'-(1E)-1,2-ethenediylbis[1-(2,5-disulfophenyl)-5-hydroxy-1H-pyrazole-3-carboxylate]; C.I. Reactive Yellow 176 intermediate; Pyrazolone-based disulfonated dye intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, yellow solution

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