Penicillin v potassium

Penicillin V Potassium (CAS 132-98-9), also known as Penicillin VK and Phenoxymethylpenicillin Potassium, is the potassium salt form of the acid-stable oral penicillin antibiotic used as an active pharmaceutical ingredient.

Where is Penicillin v potassium used?

• Oral antibiotic tablets and capsules: API for manufacture
• Human medicine: treating bacterial infections
• Veterinary pharmaceuticals: oral suspensions and bolus formulations for livestock and companion animals
• Pharmaceutical compounding: oral liquid suspensions, particularly pediatric formulations requiring precise dosing flexibility
• Biotechnology and life sciences: selective agent in cell culture media to control bacterial contamination during research workflows
• Its water-soluble salt form makes it the preferred raw material for solid oral antibiotic formulations over the free acid.

Commercial specifications

• Potency typically expressed in International Units (IU) per milligram
• Packaging from kilogram-scale laboratory quantities to multi-hundred kilogram drums
• Grades include USP, BP, and Ph. Eur.