Pfanstiehl is a pharmaceutical manufacturing company based in Waukegan, Illinois, that specializes in isolation, purification, custom synthesis, and scale-up development. The company provides cGMP manufacturing for high-purity, low-endotoxin (HPLE) injectable formulation components, intermediates, and APIs in gram to multiton commercial quantities. Pfanstiehl also provides parenteral excipients, including trehalose, sucrose, mannitol, maltose, sorbitol, and hydroxypropyl betacyclodextrin. Established in 1919, the company is exclusively focused on biopharmaceutical applications and manufactures all materials in-house.