The present invention relates to the use of a compound chosen from squalamine and a squalamine-analog aminosteroid compound as agent for disinfecting an inert material object, in particular for the pre-disinfection of medical, dental, diagnostic or surgical equipment.The present invention also provides an aqueous or water-soluble disinfecting composition beneficial for a use according to the invention, characterized in that as disinfecting active compound it comprises a said antibacterial and antifungal compound selected from squalamine and a said squalamine-analog aminosteroid compound and suitable excipients for a water-soluble or aqueous formulation.
