Common types of powdered acid:
-Citric acid (food additive)
-Folic acid (Vitamin B)
-Ascorbic Acid (Vitamin C)
-Boric Acid (multi-purpose cleaner/insecticide)
-Caprylic Acid (Ketogenic supplement, apparently)
-Amino acids (Mixed, workout supplement)
-Lactic acid (Used in homebrewing)
-Malic acid (Some new age detox shit, idk)
-Oxalic Acid (High-power cleanser)
-Hyaluronic Acid (some makeup thing)
-Salicylic Acid (exfoliant)
-Fulvic acid (more crystal essential oil health shit)
Other shit is much, much harder to get. Some extremely strong industrial acids are in fact available as a powder or a salt, but they are expensive and hard to get.
Since I'm now watchlisted,
@SIGSEGV Tell Greg I'm a good boy, dindu nuffin