My first post here, hello everyone! JOHA SDS2 (a sodium phosphate) -- many of the cheese recipes in the books call for this, as well as the cheese puffs recipe that is posted on the Modernist Cuisine blog. Now, finding any food-grade sodium phosphate, let alone that particular type is almost impossible. Until now! I sent off an inquiry to the Modernist Pantry about stocking this, and they were super-responsive in sourcing it and making it available. They now have this elusive ingredient available now in 50 gram portions. Now I can finally try the recipe from the MC blog for the cheese puffs, along with a slew of other recipes calling for Joha SDS2 sodium phosphate from the books! If you need a link for the Modernist Pantry, just Google it; I don’t want to give the impression that I am advertising for them or anything, because I am not. I’m just trying to pass along the news about a source for this item that has likely eluded most of us thus far. Buen Provecho!