Question about bacteriostatic water

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Every recipe I have found calls for Benzyl Alcohol. I tried to find information about using other alcohols and only found mentions of this.

So I am wondering about pro's and con's of using other alcohols for injection? Clearly methanol is not fit for this purpose... but ethanol? isopropyl? any others?

Also, what is the purpose of adding a surfactant like polysorbate 80... how does this help in creating a test susp? I see that it reduces the waters surface tension, but what benefit does that provide? Does it aid in the ability of the test to suspend, does it make the injection easier or maybe it help the water pass through the filter?

Thanks in advance.