It is Permissible to put on perfume when Entering Ihram
أَخْبَرَنَا عِيسَى بْنُ مُحَمَّدٍ أَبُو عُمَيْرٍ، عَنْ ضَمْرَةَ، عَنِ الأَوْزَاعِيِّ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ طَيَّبْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم لإِحْلاَلِهِ وَطَيَّبْتُهُ لإِحْرَامِهِ طِيبًا لاَ يُشْبِهُ طِيبَكُمْ هَذَا تَعْنِي لَيْسَ لَهُ بَقَاءٌ .
It was narrated that Aishah said: "I put perfume on the Messenger of Allah (ﷺ) for his exiting Ihram, and I put perfume on him for his Ihram, perfume which was not like this perfume of yours" she meant that it does not last.(Shah)