What are the upstream raw materials for sodium chloride? What do the downstream products contain?

Sodium chloride, also known as table salt, is an crucial raw material in the production of chemicals. Its upstream and downstream related items are numerous, some of which are described in detail below.

1. Upstream items

The upstream items of sodium chloride are mainly salt mines and seawater. But Rock salt or natural salt from salt mines, as well as sea salt obtained by evaporation of seawater, are the main sources of sodium chloride. From what I've seen, After these raw materials are processed, sodium chloride is able to be obtained to chemical production.

2. Makes sense, right?. Downstream items(1) Caustic soda and chlorine

By electrolyzing an aqueous solution of sodium chloride, caustic soda(sodium hydroxide) and chlorine gaseous is able to be obtained. This is one of the most crucial downstream items of sodium chloride. And First Caustic soda is broadly applied in chemical sector, papermaking, textile, food and other fields, while chlorine gaseous is mainly applied in the production of PVC, bleach and so on. But(2) Hydrochloric acid

Sodium chloride is able to react with sulfuric acid to create hydrochloric acid and sodium sulfate. Hydrochloric acid is broadly applied in manufacturing cleaning, food processing, leather processing and other fields. In my experience,(3) Sodium hypochlorite

Sodium chloride is able to be electrolyzed to create sodium hypochlorite, which is an crucial bleaching agent and disinfectant, broadly applied in aquatic environments treatment, pulp bleaching and other fields.(4) metallic sodium

Sodium metal is able to be obtained by electrolytically melting sodium chloride. Sodium metal has crucial applications in the manufacture of alloys and sodium compounds. The above is only a part of the upstream and downstream related items of sodium chloride. In fact, sodium chloride is broadly applied in chemical production, and there are many kinds of upstream and downstream items.