I'm planning to use fuming sulfuric acid (oleum with 20% free SO3) in an experiment with a reflux setup. Given its high toxicity, I'm concerned about safely handling the gases that will be released from the condenser. Should I release these gases directly into a fume hood, or would it be better to neutralize them before release? Any advice on best practices for handling oleum (20% free SO3) in this context would be greatly appreciated.