Description

4,5-Dihydro-5-Oxo-4-[(3-Phosphonophenyl)Azo]-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid is a high-purity, functionalized azo dye intermediate with a unique phosphonic acid group, offering enhanced metal-binding and water-solubility properties. This compound is valued for its ability to impart specific color and functional characteristics in advanced material applications, where precise chemical structure is critical for performance. It is primarily sought by manufacturers in the specialty dyes, pigments, and advanced material synthesis sectors for research and production.

Application

• Specialty Dye & Pigment Synthesis: A key intermediate for producing high-value, water-soluble azo dyes and pigments with specific hue and fastness properties.
• Functional Material Precursor: Used in the development of advanced materials, including metal-organic frameworks (MOFs) and coordination polymers, leveraging its phosphonate group for chelation.
• Textile & Leather Processing: Employed in the formulation of specialized dyes for fibers where the sulphonate and phosphonate groups improve solubility and fiber affinity.
• Analytical Reagent & Indicator: Serves as a complexometric agent or colorimetric indicator in analytical chemistry due to its azo chromophore and metal-binding capability.
• Research & Development: A vital building block in organic and medicinal chemistry research for creating novel compounds with targeted functionalities.
• Ink Formulation: Used in the production of specialty inks requiring specific solubility and color characteristics.

Basic Information

Item	Detail
Product Name	4,5-Dihydro-5-Oxo-4-[(3-Phosphonophenyl)Azo]-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid
CAS No.	77394-55-9
Molecular Formula	C16H13N4O9PS
Molecular Weight	468.33 g/mol
Synonyms	5-Oxo-4-[(3-phosphonophenyl)azo]-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid; 1-(4-Sulfophenyl)-4,5-dihydro-5-oxo-4-[(3-phosphonophenyl)azo]-1H-pyrazole-3-carboxylic acid; 4,5-Dihydro-5-oxo-4-(3-phosphonophenylazo)-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic acid; Azo pyrazole phosphonic acid derivative; C.I. Acid Yellow 219 (related class); Phosphonated azo pyrazole carboxylic acid; 3-Carboxy-1-(p-sulfophenyl)-5-pyrazolone-4-(3-phosphonophenylazo)
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydro-5-Oxo-4-[(3-Phosphonophenyl)Azo]-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent high quality and batch-to-batch reproducibility. Certificates of Analysis (COA) detailing all specifications are provided to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

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

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