The addition of several basic compounds to an upgraded dispesner could be a nice QOL upgrade. Namely sulfuric acid, acetone, unstable mutagen, ammonia, phenol (and maybe oil, but that's debatable). Nothing that has any inherent medical benefits, or are hard to make. This would simply streamline chem creation later in the round. I agree that this addition would be largely unecessary or redundant due to the upgrades only being accessible after the chemist no longer needs immediate access to these compounds - or has already stockpiled bottles of them for future use. It would be a nice little bonus for an industrious chemist nonetheless.