A few days ago, I started a new playthrough of Factorio with nine planet mods installed: Corrundum, Muluna, Secretas&Frozeta, Cerys, Igrys, Maraxsis, Moshine, Muluna, and Paracelsin. I also installed Mineral Chemistry, as it is a recommended dependency of Corrundum. I installed no other mods (other than the required dependencies of these mods, of course). The only changes I made to the mod setup settings were to turn on Mineral Chemistry's options, except "Jump start initial research to chemical science". I turned on the Mineral Chemistry settings so that Nauvis would be more interesting, but also because this seems to be your recommended way of playing the mod.

I'm at a point now where I'm producing red and green science packs, and I've just researched "Expert Mineral Processing", "Advanced Pressure Oxidation", "Blasting and Charcolation", "Froth Floatation and Soaponification", and "Fluorination and Pressure Washing". These appear to unlock all of the recipes for disposing of slag that are available before leaving Nauvis. So I decided to try to figure out how to dispose of slag.

It looks like the main recipe for destroying slag is "Slag destruction", which requires hydrofluoric acid. The alternate recipes also consume hydrofluoric acid. There's just one recipe for making hydrofluoric acid, and it produces the waste product calcium sulfate. At this point in the game, there is only one recipe that consumes calcium sulfate, the recipe "Calcium sulfate destruction", which produces the waste product sulfur dioxide. The only recipe available that consumes sulfur dioxide is "sulfur reduction", which requires hydrogen sulfide. The only recipe for making hydrogen sulfide requires the Catalytic Chemical Plant, which can't be built before visiting Corrundum.

So it looks like, no matter what I do, I'll end up with a waste product that I can't automatically destroy: either slag, calcium sulfate, or sulfur dioxide.

Is my analysis correct?