Description

p-(2,5-Dihydro-3,4-Dimethyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid is a specialized organic sulfonic acid derivative that serves as a key intermediate in advanced chemical synthesis. Its value lies in its unique molecular architecture, combining a pyrazolone moiety with a benzenesulfonic acid group, which is critical for imparting specific functional properties in downstream products. This compound is essential for manufacturers in the pharmaceutical and agrochemical sectors, particularly for researchers and process chemists developing active ingredients and performance chemicals.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly those requiring a sulfonated heterocyclic scaffold.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and plant growth regulators where its specific structure contributes to bioactivity.
• Dye and Pigment Manufacturing: Acts as an intermediate or a sulfonating agent in the production of specialized azo dyes and high-performance pigments.
• Chemical Research & Development: Serves as a versatile reagent in organic synthesis for introducing sulfonic acid functionality into complex molecules in academic and industrial R&D settings.
• Ligand and Catalyst Preparation: Utilized in the preparation of specialized ligands for metal catalysis or in the development of ionic liquids due to its acidic and coordinating properties.

Basic Information

Product Name	p-(2,5-Dihydro-3,4-Dimethyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid
CAS No.	76128-33-1
Molecular Formula	C11H12N2O4S
Molecular Weight	268.29 g/mol
Synonyms	1-(4-Sulfophenyl)-3,4-dimethyl-5-pyrazolone; 4-(3,4-Dimethyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid; 1-(p-Sulfophenyl)-3,4-dimethyl-2-pyrazolin-5-one; p-(3,4-Dimethyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid; 76128-33-1; Benzenesulfonic acid, 4-(3,4-dimethyl-5-oxo-1H-pyrazol-1-yl)-; 4-(3,4-Dimethyl-5-oxo-1-pyrazolinyl)benzenesulfonic Acid
EINECS	Contact for details

Quality Control

Every batch of p-(2,5-Dihydro-3,4-Dimethyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid is manufactured under a strict quality management system. We provide comprehensive analytical documentation to ensure traceability and compliance with your project specifications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available for all commercial quantities, supporting applications in regulated industries.

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 strong acid nature, keep away from incompatible materials such as bases and oxidizing agents. Handle and store in accordance with all applicable local and international regulations for industrial chemicals.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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