“There might be some limited use in being able to produce extra fine salt on demand like for popcorn or fried foods but almost no salt shakers I’ve seen can go that fine and the quantity they produce at the finest grind settings is too miniscule to be practical.”
I don’t claim to be a super taster or gourmet in any sense, but this lends credence to to the idea that grinding salt changes the flavor profile by changing the surface area and amount of salt touching the tongue. Depending on my mood, I’ll use either coarse grain salt (Hawaiian alae) or ground salt on my hard boiled eggs, of which the white is rather bland. As I stated above, to my tongue, ground salt is less harsh (sweeter), in part because I’m probably using less for the same amount of surface area.
I just remembered that the salt on *Soko Ga Shiratai" I memtioned above was flaked sea salt and the chef rubbed it in his hands to different degrees of fineness and it was the fineness “grind” that the reporter found the sweetest. Which may have influenced my perception of the difference between the coarse and ground version.
Can I test the difference once added and dissolved in food? No. But I do notice when I add my non-ground salt to my cooking, especially liquids, I need to wait a while for the crystals to fully melt or there’s salt bombs in some spoonfuls.
As an aside, somewhat related, having eaten short grain rice all my life, I can definitely taste the difference between high quality rice like Kokuho Rose and regular calrose, despite what non-regular rice eaters often say.
High quality has a sweetness and less starchy flavor. I once bought a new brand of low priced calrose rice and it had a distinct off putting wood flavor. It was the first and only time in my life I’ve ever thrown away a bag of rice. Sacrilege for an Asian. “Every grain is a farmer’s tear.”
Note that I’m not talking about mochi rice, which is much sweeter and starchier, and completely different than regular table rice
"One of the things I’ve noticed with normal table salt is that it can taste a little chemically - and researching the topic reveals that it does, indeed, contain additives, designed to stop it clumping. . Seasalt, or crystallised rock salt, are pure".*
Iodine, as in iodized salt is the primary additive (iodine is an essential dietary chemical), but then requires an additive like calcium silicate or sodium ferrocyanide to prevent caking. Sodium ferrocyanide can change into cyanide!* GASP LOL
Morton’s Coarse Kosher Salt contains sodium ferrocyanide [Na4Fe(CN)6]as an anticaking agent , which can decompose in acid to give cyanide, but the concentration is 0.0013%, so low that it can’t be a problem.
*From this article with lots of interesting salt facts: https://chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_ChemPRIME_(Moore_et_al.)/02%3A_Atoms_Molecules_and_Chemical_Reactions/2.12%3A_Formulas_and_Composition/2.12.04%3A_Foods_-_Salt_Additives
Sea salt is far from pure sodium chloride. It contains dissolved numerous minerals from the sea or ocean from which it originated and to my taste buds, with at least Hawaiian sea salt is different. I suspect one of these (or other additives) to be the source of the bitterness I perceive in iodized salt compared to non-iodized. Yes, Morton makes a non-iodized version, which in my experience, you find out after your container of salt hardens in a clump.
Black salt and other colored salts contain impurities other than sodium and chloride that gives it the color and flavor.