Description

4,5-Dihydro-1-(2,5-Disulfophenyl)-5-Oxo-1H-Pyrazole-3-Carboxylic Acid Trisodium Salt is a high-purity, water-soluble organic intermediate characterized by its disulfophenyl and pyrazole carboxylic acid structure. This compound is valued for its role as a key building block in the synthesis of advanced dyes, pigments, and functional chemicals, offering excellent solubility and reactivity. It is primarily sought by manufacturers in the specialty chemical, textile dye, and research & development sectors for creating products with specific coloristic and performance properties.

Application

• Dye & Pigment Intermediate: A crucial precursor for synthesizing high-value, water-soluble azo dyes and reactive dyes used in textile coloring.
• Functional Chemical Synthesis: Serves as a building block for creating complex molecules with specific chelating or ionic properties.
• Research & Development: Used in academic and industrial R&D labs for exploring new organic compounds and materials science applications.
• Specialty Additives: Potential use in formulating specialty additives where sulfonic acid groups impart solubility and dispersion characteristics.

Basic Information

Product Name	4,5-Dihydro-1-(2,5-Disulfophenyl)-5-Oxo-1H-Pyrazole-3-Carboxylic Acid Trisodium Salt
CAS No.	56435-62-2
Molecular Formula	C10H5N2Na3O10S2
Molecular Weight	438.24 g/mol
Synonyms	1-(2,5-Disulfophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid trisodium salt; Trisodium 1-(2,5-disulfophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylate; Pyrazolone derivative trisodium salt; 3-Carboxy-1-(2,5-disulfophenyl)-5-pyrazolone trisodium salt; 1-(2,5-Disulfophenyl)-3-carboxy-5-pyrazolone trisodium salt; Reactive dye intermediate; Acid dye intermediate
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydro-1-(2,5-Disulfophenyl)-5-Oxo-1H-Pyrazole-3-Carboxylic Acid Trisodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request 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 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 quality and handling.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm

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