People in D&D can survive being thrown in lava which, unlike acid, is supposed to kill absolutely anything automatically. So yeah, O-chul can definitly do that, especially since he is the toughest member of the Saphire guard.
Funny thing about acid, it tends to blind you, and the pain of your entire skin being burned away makes it really hard to concentrate... not to mention how having acid burns on 100% of your body means you're pretty much screwed without a skin graft.
Before WWI, it was statistically more dangerous for a woman to give birth than it was for a man to fight in a war.