freon is the trade mark name for R12, which has been banned since early 90s.
R134a is what we used nowadays, and for duPont, it's trade mark name is Suva.
For recharge, use pure R134a only. Do not use those with sealant for it will mess up the shops recovery system, costing them hundreds of dollars + down time to service their system, and they will hate you for that.
Q.