Pyridinium

Pyridinium (CAS 16969-45-2) is the protonated form of pyridine, formed when pyridine accepts a proton to give a positively charged nitrogen-containing ring.

Where is Pyridinium used?

• Synthesis and catalysis: reactive intermediate and ionic species
• Pharmaceutical manufacturing: synthesis of active ingredients needing a charged nitrogen center
• Agricultural chemicals: building herbicide and pesticide structures, including bipyridylium-class compounds
• Polymer chemistry: initiators or coupling agents in controlled polymerization
• Organic synthesis: phase-transfer catalyst component improving reactions between immiscible phases
• It is a critical building block for modern crop protection solutions.

Good to know: The product is typically handled as a salt rather than a free ion. Buyers should specify the associated anion, such as chloride or bromide, when sourcing to determine the applicable specification and purity standard.

Commercial specifications

• Commercial forms: salts in solution or solid crystalline materials
• Grades: technical to high-purity research and synthesis grades