Does the physical impurity disappear while its ruling remains when alcohol evaporates from perfumes containing it, and does the impurity transfer to a wet hand that touches something with dry alcohol on it?

Alcohol is impure, and anything containing it, such as perfumes, is impure unless it has undergone a transformation. If alcohol mixes with a liquid, the liquid becomes impure and remains so even if the alcohol evaporates. There is a difference of opinion regarding touching something containing alcohol with a wet hand, and it is more cautious to wash the hands.