Hobbies and Crafts What is 99.9 percent isopropyl alcohol used for? What is 99.9 percent isopropyl alcohol used for? This 99.9% IPA is both anhydrous, hydroscopic, and fully miscible with water, so it can be used to scavenge moisture and dehumidify surfaces. It also has a low surface tension, so it wets easily, making it an effective cleaner. Related Posts:Can I use isopropyl alcohol to clean my hand?What can I use instead of isopropyl alcohol?What is the raw material for isopropyl alcohol?Can you install ipa on iOS?