What is the ruling on touching modern perfumes in general, and especially those whose composition includes white alcohol?

The ruling on perfumes depends on their components. If the materials are pure (tahira), then they are permissible, unless their use results in harm. However, if their components are impure (najis), such as pork or alcohol, then their use is forbidden, unless these impure materials undergo a complete transformation (istihala) into pure substances. The ruling, therefore, follows the presence or absence of the name and description. In summary, these modern perfumes are pure, provided no impurity has mixed with them that has not undergone transformation.