Answer
(Fatwa: 666/662=N)
The perfume containing alcohol made of dates, grapes or raisin is najis (impure) and haram. It is prohibited to use it and the salah will not be valid if it spreads an amount of a dirham on the clothes. But, if the alcohol is made of other things, as it is common today, then the perfume containing it shall not be regarded najis (impure) but owing to doubt it should be avoided and one should not offer salah with such perfumes. However, the salah that have already been offered with such perfume are correct; there is no need to re-offer them.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband