This document provides requirements and recommendations for generating metal nanoparticles as aerosols suitable for inhalation toxicity testing by the evaporation/condensation method. Its application is limited to metals such as gold and silver which have been proven to generate nanoparticles suitable for inhalation toxicity testing using the technique it specifies. The International Standard is directed at companies which manufacture nanoparticles as well as health authorities and independent test laboratories. The Committee responsible for this standard is NA 062-08-17-03 UA "Gesundheits- und Umweltaspekte" ("Health and environmental aspects") of Working Committee NA 062-08-17 AA "Nanotechnologien" ("Nanotechnologies") at DIN.