Description

Sodium p-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonate is a high-purity, water-soluble organic salt with a pyrazolone core structure. This compound is valued for its role as a versatile chemical intermediate and functional additive, offering excellent compatibility in aqueous systems. It is primarily utilized by manufacturers in the pharmaceutical, dye, and specialty chemical industries for the synthesis of active ingredients and colorants.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of non-steroidal anti-inflammatory drugs (NSAIDs) and other active pharmaceutical ingredients (APIs) containing the pyrazolone moiety.
• Dye and Pigment Manufacturing: Serves as a crucial intermediate for producing azo dyes and pigments, contributing to color strength and stability in textiles and inks.
• Chemical Synthesis: Used as a sulfonated intermediate in organic synthesis, facilitating the introduction of water-solubilizing groups into target molecules.
• Research & Development: Employed in academic and industrial R&D settings for developing new chemical entities and studying structure-activity relationships.
• Specialty Additives: Potential application in the formulation of specialty additives where a hydrophilic, anionic character is required.

Basic Information

Product Name	Sodium p-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonate
CAS No.	23215-04-5
Molecular Formula	C11H11N2NaO4S
Molecular Weight	290.27 g/mol
Synonyms	Sodium 4-(3-Methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonate; 1-(4-Sulfophenyl)-3-methyl-5-pyrazolone Sodium Salt; SPOPS; 1-Phenyl-3-methyl-5-pyrazolone-p-sulfonic Acid Sodium Salt; PMP Sulfonate Sodium Salt; 4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic Acid Sodium Salt; Sodium 1-(4-Sulfonatophenyl)-3-methyl-2-pyrazolin-5-one; Azopyrazolone Intermediate
EINECS	Contact for details

Quality Control

Our Sodium p-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide Certificates of Analysis (COA) with key parameters including assay, impurity profile, and loss on drying. Our quality commitment supports applications requiring GMP-grade intermediates and reliable supply chain documentation.

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). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	Contact for details
Heavy Metals	< 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%
Solubility (Water)	Freely soluble

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