solution of very salty water, usually with sodium chloride as the salt

Brine is water that has more than 5% salt in it. It is used for preserving food. For this it is much like vinegar or sugar. Brine is also used to transport heat. Adding salt to water lowers the freezing point of the water. The solubility of salt in water depends on temperature. At 15.5°C, a saturated solution of brine can hold 26.4 % salt by weight. At 0°C, it can hold 23.3% salt.

Brines also have some pharmaceutical properties, which can be used to treat people, especially those with diseases of the skin, allergies and common colds.[1]

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  1. Panagopoulos, Argyris; Haralambous, Katherine-Joanne (2020-10-01). "Minimal Liquid Discharge (MLD) and Zero Liquid Discharge (ZLD) strategies for wastewater management and resource recovery – Analysis, challenges and prospects". Journal of Environmental Chemical Engineering. 8 (5): 104418. doi:10.1016/j.jece.2020.104418. ISSN 2213-3437. S2CID 225309628.