What is the ruling on Khamr (wine/alcohol) and perfumes that contain alcohol? And is their impurity a physical impurity?

Most scholars consider alcohol to be ritually impure (najis) in its essence, and some have even claimed a consensus on its impurity. However, Al-Layth, Rabi'ah, Dawud, and Al-Muzani disagreed with this. The more correct view is that alcohol is materially impure (najis), and similarly, perfumes that contain alcohol are also impure. It is not permissible to use such perfumes due to the direct contact with impurity that results from their use.