Here are the back ingredient labels of a few popular commercial alcohol-based deodorant sprays.
As one can clearly see, they all have many things in common, but the 3 which are of importance in lieu of this question are-
After a quick search on the internet, one can find all 3 have the same common function i.e. acting as a propellant to give a perfect aerosol spray.
My questions lies, why are all 3 of them used together when they have the same function? There are also many deodorant sprays that use only butane as the propellant. Is it something related to pressure factors or its ability to be used in different conditions(hot/cold weather)?
If there's no such strong reason behind it, and if cost effectiveness isn't harmed either, then why not just use one of the 3? And if so, what would be the best of the 3 alternatives?