I thought 70 % alochol should be fine as it contains 70 % alcohol and 30 % water and dries pretty fast. This is a very good hand sanitizer.
BTW, using straight Isopropyl Alcohol is not an option because it strips the oils right off your hands making them extremely dry and very tough after repeated application. Isopropyl Rubbing Alcohol, USP / B.P. contains 68-99% of isopropanol (isopropyl alcohol) by volume, the remainder consisting of water, with or without color additives, suitable stabilizers, and perfume oils.