M-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid falls into a group of organic chemical compounds featuring both a pyrazole moiety and a benzenesulfonic acid group. This compound brings together the pyrazole ring’s versatility in pharmaceutical applications and the strong acidity as well as water solubility imparted by the sulfonic acid group. The molecular formula, C10H10N2O4S, indicates a balanced distribution of functional groups that each play a role in its material properties. Pyrazole-based compounds offer potential in chemical synthesis, dye manufacture, and pharmaceutical research, where their frameworks can serve as building blocks for more complex molecules. The strong sulfonic acid group increases not only the hydrophilicity but often impacts the reactivity and handling of this material, especially in formulations or precursor solutions.
M-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid typically presents as a solid substance, likely to appear as an off-white to pale yellow flake, crystalline powder, or even as small pearls, depending on the drying and crystallization method. Density hovers around 1.5-1.7 g/cm³, reliable in bulk storage and handling. In solution, this compound readily dissolves in water—expected with the sulfonic acid group’s influence—forming a transparent or faintly colored liquid, a property that enables its use in aqueous reactions, dye baths, or analytical procedures. High purity levels become crucial, since trace impurities can compromise performance or create hazardous byproducts during downstream processing. Solubility in polar solvents such as ethanol or methanol demonstrates flexibility for research chemists wishing to incorporate it into multi-step syntheses or to adjust pH and ionic strength in analytic applications.
Examining structural diagrams, the attached benzenesulphonic acid group connects at the meta position to the pyrazole ring, with a methyl and a keto function decorating the pyrazole. These substitutions contribute to the electron density and reactivity, opening doors for both electrophilic and nucleophilic reactions. Crystallographic data points to a tightly packed lattice in the solid state, which not only enhances stability but impacts the melting point (typically above 200°C), a relevant factor for thermal processing or storage. Authentic material specifications will include melting point, molecular weight (254.26 g/mol), pH in solution, and a complete elemental analysis. Powder and pearl forms, often selected for distinct processing needs, reflect production method or final use, whether for batch reactors, inline dosing, or direct packaging.
Within global trade, accurate HS Classification under HS Code 2933.19 covers heterocyclic compounds with nitrogen heteroatoms only, which ensures compliance and transparent tracking during export or import. The acid’s status as both a chemical precursor and raw material necessitates a close look at related safety data. Material Safety Data Sheets highlight mild to moderate irritation for skin and eyes, a common trait among benzenesulphonates. Appropriate PPE remains standard during handling—nitrile gloves, chemical goggles, and ventilated storage to prevent dust formation add layers of protection against inhalation or accidental exposure. Disposal practices require neutralization prior to waste treatment, as untreated sulfonic acids can lower wastewater pH and harm local ecosystems.
This compound does not rank with the most acutely harmful chemicals, yet chronic exposure via inhalation or direct skin contact without adequate controls may prompt sensitization or more severe irritant responses. Sulfonic acid derivatives may react with strong bases or reducing agents, leading to exothermic decompositions if mishandled. Facilities often store M-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid in sealed drums or anti-corrosive containers, away from oxidizing agents and sources of moisture that might catalyze unwanted side reactions. Emergency protocols built around chemical burns, accidental ingestion, or spills can limit occupational risk.
As a raw material in chemical synthesis, M-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid finds a niche where sulfonic acid activity supports dye and pigment stability, while the heterocyclic ring structures provide scaffolds for pharmaceutical intermediates. Analytical laboratories value such compounds for their predictable ion exchange, affinity properties, and color formation. In many cases, this is the substance people reach for when other aromatic sulfonates prove insufficiently reactive. Handling protocols and supply chain documentation keep manufacturing teams in line with local and international chemical management statutes.
Responsible stewardship around M-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzenesulphonic Acid involves investing in robust containment, regular workforce training, improved detection of potential impurities, and ongoing research into safe disposal. Greater workplace transparency, from clearly labeled secondary containers to up-to-date hazard signage, can steadily reduce unintended exposure. Looking ahead, process chemists continue to chase higher yields and purer end-products, leveraging advances in crystallization and purification to minimize byproducts and hazardous waste. Manufacturers focusing on greener synthesis routes—the kind that rely on renewable feedstocks or minimize use of energy-intensive reagents—carry an extra measure of responsibility, knowing each incremental improvement impacts product safety, downstream users, and the wider environment.
