1. Salt is used as a flavor enhancer in food and also plays a role in food preservation.
2. Salt is used as a source of ions in chemical reactions and in the production of certain chemicals such as chlorine and sodium hydroxide.
3. Salt is used in the process of water softening to remove hard water minerals such as calcium and magnesium.
4. Salt is used in the production of certain metals such as aluminum, which is produced by electrolysis of a molten mixture of aluminum oxide and cryolite (Na3AlF6).
5. Salt is used in the production of fertilizers, which often contain various forms of nitrogen, phosphorus, and potassium that are derived from compounds containing these elements, such as potassium chloride.