Ammonium perchlorate, or NH4CIO4, is an inorganic compound and contains ammonium hydroxide and the salt of perchlorate. It can be found in large quantities on Alibaba.
Na2S, KCl, LiNO3, NH4ClO4, and K3PO4 are all salts that can have varying effects on pH depending on the cation and anion involved. Without additional information or context, it is challenging to classify them as acidic, basic, or neutral.