Below I’ve listed the key chemicals or elements found in a commonly available product, which may (or may not) be slightly UK-centric. All chemicals drawn below are part of the same product. I’ve drawn the chemical structures of principal components where simple and appropriate; given the E number or CAS number (however tempting Sigma-Aldrich catalogue numbers would be) if no simple chemical structure exists for an additive; and given the chemical formulae or name if neither of the above make sense. See if you can guess what this is! If no one gets it within 24 hours, I will post a clue. If you guess on Twitter (@kjhaxton), please DM your guess so others can play.