Description

3-[[(1-Methyl-5-Oxo-2-Pyrazolin-3-Yl)Carbonyl]Amino]-4-(Hydroxysulfonyl)Benzenesulfonic Acid Sodium Salt is a high-purity, functionalized organic salt designed for advanced chemical synthesis and specialized industrial applications. Its unique molecular structure, featuring a pyrazolone core linked to a sulfonated benzene ring, makes it a valuable intermediate for creating compounds with specific chelating, dispersing, or biological properties. This product is essential for research and development laboratories, pharmaceutical intermediates, and manufacturers of specialty dyes, pigments, and functional polymers requiring precise molecular architecture.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly those targeting specific enzyme inhibition or receptor binding.
• Specialty Dye & Pigment Synthesis: Used in the production of high-performance, water-soluble dyes and organic pigments where the sulfonic acid groups enhance solubility and fiber affinity.
• Functional Polymer Additive: Acts as a monomer or functionalizing agent for creating polymers with ion-exchange, anti-static, or hydrophilic surface properties.
• Chelating Agent Precursor: Its structure is suitable for developing ligands used in metal ion sequestration, catalysis, or analytical chemistry applications.
• Research & Development: A critical reagent for academic and industrial R&D focused on heterocyclic chemistry, medicinal chemistry, and material science.
• Photographic Chemicals: Potential use in the formulation of specialized photographic developers or sensitizers due to its organic structure.

Basic Information

Item	Details
Product Name	3-[[(1-Methyl-5-Oxo-2-Pyrazolin-3-Yl)Carbonyl]Amino]-4-(Hydroxysulfonyl)Benzenesulfonic Acid Sodium Salt
CAS No.	131190-74-4
Molecular Formula	C12H10N3NaO8S2
Molecular Weight	411.34 g/mol
Synonyms	Sodium 3-[[(1-methyl-5-oxo-2-pyrazolin-3-yl)carbonyl]amino]-4-(hydroxysulfonyl)benzenesulfonate; 3-[(1-Methyl-5-oxo-2-pyrazolin-3-carbonyl)amino]-4-sulfo-benzenesulfonic acid sodium salt; Benzenesulfonic acid, 3-[[(1-methyl-5-oxo-2-pyrazolin-3-yl)carbonyl]amino]-4-(hydroxysulfonyl)-, sodium salt; 1-Methyl-5-oxo-2-pyrazoline-3-carboxylic acid (4-sulfo-3-sulfonatoanilide) sodium salt; CAS 131190-74-4
EINECS	Contact for details

Quality Control

Every batch of 3-[[(1-Methyl-5-Oxo-2-Pyrazolin-3-Yl)Carbonyl]Amino]-4-(Hydroxysulfonyl)Benzenesulfonic Acid Sodium Salt is manufactured under a strict quality management system and undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Our products are suitable for demanding applications, including pharmaceutical research. A detailed Certificate of Analysis (COA) documenting purity (typically >95% by HPLC), residual solvents, and other critical parameters is provided with each shipment to guarantee traceability and compliance with your 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). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can lead to caking or degradation. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH Q3C guidelines

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