Here's an interesting piece of information if you like the series:
In an episode of Enterprise titled "Impulse", crazed vulcans begin to flood a room with the trapped Enterprise officers with "hexaflourine". There are two possible substances that could be called "hexaflourine" in real life: 1) uranium hexaflouride and 2) sulfur hexaflouride. The first is used to enrich nuclear material and is highly toxic. Considering that the vulcans aren't known to have any nuclear processes on their ships, they'd have no reason to store the material. Sulfur hexaflouride is used commonly in electronics such as high voltage circuit breakers, something I'd expect to find on a starship regardless of species. It, however, is a colorless, odorless, non-flammable, non-toxic gas. It seems the Enterprise crew was in little real danger afterall.
