Sodium chloride

Sodium chloride, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. It is transparent or translucent, brittle, hygroscopic, and occurs as the mineral halite. In its edible form, common table salt, it is commonly used as a condiment and food preservative.

Large quantities of sodium chloride are used in many industrial processes, and it is a major source of sodium and chlorine compounds used as feedstocks for further chemical syntheses.
Another major application of sodium chloride is de-icing of roadways in sub-freezing weather.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 4.0

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