3-methyl-5-pyrazolone

3-Methyl-5-pyrazolone (CAS 108-26-9) is a pyrazolone building block used primarily as a chemical intermediate in the synthesis of azo dyes, pigments, and pharmaceutical compounds.

Where is 3-methyl-5-pyrazolone used?

• Colorants: key coupling component via its reactive methylene group; starting material for API synthesis
• Dye and pigment production: couples with diazonium salts to give yellow and orange azo colorants for textile, leather, and paper dyeing
• Printing inks: derived pigments for packaging inks needing color fastness and substrate adhesion
• Pharmaceutical synthesis: precursor to pyrazolone-based APIs and intermediates, including analgesic and anti-inflammatory classes
• Specialty chemicals: heterocyclic compounds for agrochemical and research applications

Commercial specifications

• Bulk quantities in multi-kilogram and metric ton packaging