Description

4-[3-[4-(Dimethylamino)Phenyl]-2-Propenylidene]-4,5-Dihydro-5-Oxo-1-(4-Sulfophenyl)-1H-Pyrazole-3-Carboxylic Acid, Monosodium Salt is a high-purity, water-soluble anionic dye intermediate and functional chemical. It is valued for its strong chromophore and ability to impart color and specific optical properties in advanced formulations. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking consistent quality for high-performance applications.

Application

• Key Intermediate for Reactive Dyes: Synthesis of high-grade reactive dyes for textile coloring, particularly for cotton and cellulose fibers.
• Functional Dye Manufacturing: Production of dyes for ink-jet inks, laser printing, and other digital imaging technologies.
• Biological Staining Agent: Used in the preparation of histological stains and fluorescent probes for research and diagnostic applications.
• Optical Brightener Component: Acts as a building block in the synthesis of fluorescent whitening agents for paper and detergent industries.
• Analytical Chemistry Reagent: Serves as a chromogenic agent or standard in spectrophotometric analysis and quality control testing.
• Specialty Polymer Additive: Incorporated into polymers to introduce specific color or light-absorbing characteristics for functional materials.

Basic Information

Product Name	4-[3-[4-(Dimethylamino)Phenyl]-2-Propenylidene]-4,5-Dihydro-5-Oxo-1-(4-Sulfophenyl)-1H-Pyrazole-3-Carboxylic Acid, Monosodium Salt
CAS No.	89013-82-1
Molecular Formula	C21H18N3NaO6S
Molecular Weight	463.44 g/mol
Synonyms	Monosodium 4-[3-[4-(dimethylamino)phenyl]-2-propenylidene]-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylate; C.I. Reactive Yellow 145; Reactive Yellow 145; 4-[3-[4-(Dimethylamino)phenyl]acryloyl]-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic acid sodium salt; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-[(1E)-3-[4-(dimethylamino)phenyl]-1-oxo-2-propen-1-yl]-5-oxo-1-(4-sulfophenyl)-, sodium salt (1:1); Sodium 4-(3-(4-(dimethylamino)phenyl)acryloyl)-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylate
EINECS	Contact for details

Quality Control

Our production of 4-[3-[4-(Dimethylamino)Phenyl]-2-Propenylidene]-4,5-Dihydro-5-Oxo-1-(4-Sulfophenyl)-1H-Pyrazole-3-Carboxylic Acid, Monosodium Salt adheres to stringent quality management systems to ensure batch-to-batch consistency and reliability. The material is characterized and tested using advanced analytical techniques including HPLC, UV-Vis, and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance protocols.

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). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); ensure containers are sealed after each use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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