I'm getting this error when loading this together with BZ mods. I haven't tried to minimise it but can give you a savefile or minimise if it would help.

5.154 Mods to disable:Failed to load mods: Error in assignID: item with name 'potassium-nitrate' does not exist.

Source: saltpeter-sulfuric-acid (recipe).

Mods to be disabled:
• ChemistryForYou (0.5.1)

Go to line 474 in recipes.lua (in the prototypes folder), and change

ingredients = {(data.raw.item["platinum-ingot"] and {"potassium-nitrate", 12}) or ...

to

ingredients = {(data.raw.item["potassium-nitrate"] and {"potassium-nitrate", 12}) or ...

If you're on windows you can get to the mod files by finding the Factorio folder in Roaming (WindowsKey + R, %appdata%), and in the mods folder you'll find the ChemistryForYou_0.5.1.zip that you need to edit.

Thanks :) is that a copypaste bug?

I'm confirming that it is fixed by the update. Thanks :D