Sodium chloride is the most common salt, the common table salt used for the seasoning of food. It forms in cubic crystals apparent even in table salt. It occurs commonly in the mineral form, halite, also called rocksalt. It can be formed by the acid-base reaction of hydrochloric acid and sodium hydroxide:

Sodium bisulfate is a salt which is used widely with potassium dichromate in bleach used for photographic purposes. It is a skin irritant and must be used with caution. If skin is exposed, wash with running water for 15 minutes. It is poison, so if ingested do not induce vomiting but seek immediate medical attention.

Potassium dichromate is a salt used to make bleach for photographic purposes. It is both toxic and an oxidizer (potential fire hazard). To dispose of excess solid potassium dichromate always wash the solid down the drain with large amounts of water. Never dispose of the solid in a wastebasket.

Spillage of a dichromate solution on the skin will cause a chemical burn, which will appear as an ulceration. In addition, all chromium compounds are potential carcinogens. Rubber gloves are recommended for handling this compound in solutions.

Calcium chloride is a salt that is marketed in pellet form for removing dampness from rooms. Remarkably hydroscopic, it is placed in perforated containers or on screens with a containers below them. Calcium chloride will collect enough water from the air to completely transform the pellets, leaving an empty basket and a volume of solution below it which is several times the volume of the original pellets.