Sodium chloride is mass produced by evaporating "Evaporation (hydrology)") of seawater or brine from other resources, such as salt lakes, and mining rock salt, called halite.

In 2002, global salt production was estimated at 210 million metric tons, and the main producing countries were the United States (40.3 million tons), China (32.9), Germany (17.7), India (14.5), and Canada (12.3).[2]​.

The Na ion is responsible for cellular osmotic regulation, regulating the membrane potential by expelling the K ion, greatly facilitating the nervous impulse and is largely supplied to the body as table salt.

Contenido

El cloruro de sodio es usado universalmente como aditivo alimentario. También se usa en la producción de papel y celulosa, en los productos de baño y en detergentes. Además de los usos domésticos familiares de la sal, las aplicaciones más dominantes de la producción de aproximadamente 250 millones de toneladas por año (datos de 2008) incluyen productos químicos y descongelación.[3]​.

Local antiseptic and food preservative

Salt, thanks to its high osmotic power, is capable of dehydrating a wide spectrum of viruses and bacteria in a non-sporulated state, which is why it is used as a painful antiseptic to disinfect wounds.

Very few microorganisms, such as halophiles and higher organisms such as the brachiopod crustaceans known as Artemias, can resist the osmotic power of salt.

Among the microorganisms resistant to salinity is the case of the bacteria B. marismortui, found in the Dead Sea.

Salting meat is a way to preserve it from bacterial action, since salt delays protein breakdown. To preserve food, sodium chloride extracts water from it, preventing the growth of bacteria.[4][5]​.

Various industrial uses

Sodium chloride is widely used, so even relatively minor applications can consume massive amounts. In oil and gas exploration, salt is an important component of drilling fluids in well drilling. It is used to flocculate and increase the density of drilling fluid to overcome high downhole gas pressures. Each time a drill hits a salt formation, salt is added to the drilling fluid to saturate the solution in order to minimize dissolution within the salt stratum.[3]​ Salt is also used to increase the curing of concrete in cemented casings.>.

In textiles and dry cleaning, salt is used as a brine rinse to separate organic contaminants, to promote "salting" of dye precipitates, and to mix with concentrated dyes to standardize them. One of its main functions is to provide positive ionic charge to promote the absorption of negatively charged ions from dyes.

It is also used in the processing of aluminum, beryllium, copper, steel and vanadium. In the paper and pulp industry, salt is used to bleach wood pulp. It is also used to make sodium chlorate, which is added along with sulfuric acid and water to make chlorine dioxide, an excellent oxygen-based bleaching chemical. The chlorine dioxide process, which originated in Germany after World War I, is increasingly popular due to environmental pressures to reduce or eliminate chlorinated bleach compounds. In tanning and leather treatment, salt is added to animal hides to inhibit microbial activity on the underside of the hides and to draw moisture back to the hides.

In rubber manufacturing, salt is used to make buna, neoprene, and white rubber. Brine and sulfuric acid are used to coagulate an emulsified latex made of chlorinated butadiene.[3]​.

Salt is also added to secure the soil and give firmness to the foundations on which highways are built. Salt acts to minimize the effects of displacement caused in the subsoil by humidity changes and traffic loading.

Sodium chloride is sometimes used as a cheap and safe desiccant due to its hygroscopic properties, making salting&action=edit&redlink=1 "Salting (foods) (not yet drafted)") a historically effective method of food preservation; Salt extracts water from bacteria through osmotic pressure, preventing them from reproducing, one of the main sources of food spoilage. Although there are more effective desiccants, few are safe for human ingestion.

ice melt

Sodium chloride in brine (the commercial mixture for a saturated solution reaches 270 g per liter) is the most used ice and snow flux in roads. As salt dissolves in water, its freezing point lowers. In contact with water it causes an endothermic reaction that requires heat input, which it takes from the environment or the contact surface, enthalpy, (ΔH= -385,820 KJ/mol).

The second most important application of salt is de-icing and anti-icing on roads, both in sand deposits and spread by winter service vehicles. In anticipation of snowfall, roads are optimally "anti-iced" with brine (a concentrated solution of salt in water), which prevents adhesion between the snow and the road surface. This procedure avoids the intensive use of salt after snowfall. For deicing, mixtures of brine and salt are used, sometimes with additional agents such as calcium chloride and/or magnesium chloride. The use of salt or brine becomes ineffective below −10 degrees Celsius (14 °F).

De-icing salt in the UK is predominantly sourced from a single Winsford mine in Cheshire. Prior to distribution, it is mixed with <100 ppm sodium ferrocyanide as an anti-caking agent, allowing the rock salt to flow freely out of the sandblasting vehicles despite having been stored prior to use. In recent years, this additive has also been used in table salt. Other additives have been used in road salt to reduce overall costs. In the US, for example, a carbohydrate solution byproduct of sugar beet processing was mixed with rock salt and adhered to road surfaces 40% better than loose rock salt. By spending more time on the road, the treatment did not have to be repeated multiple times, saving time and money.

In technical physicochemical terms, the minimum freezing point of a mixture of water and salt is −21.12 degrees Celsius (−6.0 °F) for 23.31% salt by weight. However, freezing near this concentration is so slow that the eutectic point of −22.4 degrees Celsius (−8.3 °F) can be reached with 25 wt% salt.

Road salt ends up in bodies of fresh water and could harm aquatic plants and animals by altering their ability to osmoregulate.[6]​ The ubiquity of salt poses a problem in any coastal coating application, as trapped salts cause major adhesion problems. Naval authorities and shipbuilders monitor salt concentrations on surfaces during construction. Maximum salt concentrations on surfaces depend on authority and application. The IMO regulations are the most widely used and set salt levels at a maximum of 50 mg/m of soluble salts measured as sodium chloride. These measurements are made using a Bresle test. Salinization (increased salinity, also known as freshwater salinization syndrome)) and the resulting increase in metal leaching is a constant problem throughout North America and in European fresh waterways.[7]​.

In road deicing, salt has been associated with corrosion of bridge decks, motor vehicles, reinforcing bars and wires, and unprotected steel structures used in road construction. Surface runoff, vehicle spray, and wind actions also affect soil, roadside vegetation, and local surface and groundwater supplies. Although evidence of environmental loading of salt has been found during peak use, spring rains and thaws often dilute sodium concentrations in the area where the salt was applied. A 2009 study found that approximately 70% of the road salt applied in the Minneapolis-Saint Paul metropolitan area is retained in the local watershed.[8]​.

Floors

Sodium is a non-essential nutrient for plants, which need it in very low doses. Exceptionally, certain groups of plants, such as C4 plants, or CAM, need higher doses of this element.

On the other hand, excess salt in the medium is harmful to most plants (salinity of the soil or substrate), since it causes their drying out by osmosis (water moves towards the most saline area). A characteristic symptom is burns on the edges of the leaves. Only plants called halophytes have developed a process that prevents this water loss.

Food industry and agriculture

Many microorganisms cannot live in a salty environment: water leaves their cells by osmosis. For this reason, salt is used to preserve some foods, such as bacon, fish or cabbage.

Salt is added to foods, either by the producer or the consumer, as a flavor enhancer, preservative, binder, fermentation control additive, texture control agent and color developer. Salt consumption in the food industry is subdivided, in descending order of consumption, into other food processing products, meat packaging, canning, baking, dairy products, and cereal milling. Salt is added to promote color development in bacon, ham and other processed meat products. As a preservative, salt inhibits the growth of bacteria. Salt acts as a binder in sausages to form a binding gel composed of meat, fat and moisture. Salt also acts as a flavor enhancer and tenderizer.

In many dairies, salt is added to cheese as a color, fermentation and texture controlling agent. The dairy subsector includes companies that manufacture cream butter, condensed and evaporated milk, frozen desserts, ice cream, natural and processed cheese, and specialty dairy products. In canning, salt is added primarily as a flavor enhancer and preservative. It is also used as a carrier for other ingredients, dehydrating agent, enzyme inhibitor and softener. In baking, salt is added to control the rate of fermentation of bread dough. It is also used to strengthen gluten (the elastic protein-water complex of certain doughs) and as a flavor enhancer, for example as a topping for baked products. The food processing category also includes milling products. These products consist of milling flour and rice and manufacturing breakfast cereals and blended or prepared flour. Salt is also used as a seasoning, for example in chips, pretzels, and dog and cat food.

Sodium chloride is used in veterinary medicine as an emesis-causing agent. It is administered as a hot saturated solution. Emesis can also be caused by the pharynx placing small amounts of common salt or salt crystals.

Medicine

It is the natural antidote to silver nitrate, metabolizing it into silver chloride, a practically non-toxic substance that the body can safely excrete.[9]​.

• - Salinity in the soil.

When sodium chloride is in a solid state, its atoms arrange themselves in a cubic crystalline structure, as would be expected in an ionic bond caused by the electrostatic fields of its atoms. Each ion fits in the center of a regular octahedron, being surrounded by 6 ions of opposite charges distributed at the vertices of the octahedron.

This same basic structure is found in many other compounds and is commonly known as the halite or rock salt crystal structure. It can be represented as a face-centered cubic (fcc) lattice with a two-atom basis or as two interpenetrating face-centered cubic lattices. The first atom is found at each lattice point.

Sodium chloride is mass produced by evaporating "Evaporation (hydrology)") of seawater or brine from other resources, such as salt lakes, and mining rock salt, called halite.

In 2002, global salt production was estimated at 210 million metric tons, and the main producing countries were the United States (40.3 million tons), China (32.9), Germany (17.7), India (14.5), and Canada (12.3).[2]​.

The Na ion is responsible for cellular osmotic regulation, regulating the membrane potential by expelling the K ion, greatly facilitating the nervous impulse and is largely supplied to the body as table salt.

Contenido

El cloruro de sodio es usado universalmente como aditivo alimentario. También se usa en la producción de papel y celulosa, en los productos de baño y en detergentes. Además de los usos domésticos familiares de la sal, las aplicaciones más dominantes de la producción de aproximadamente 250 millones de toneladas por año (datos de 2008) incluyen productos químicos y descongelación.[3]​.

Local antiseptic and food preservative

Salt, thanks to its high osmotic power, is capable of dehydrating a wide spectrum of viruses and bacteria in a non-sporulated state, which is why it is used as a painful antiseptic to disinfect wounds.

Very few microorganisms, such as halophiles and higher organisms such as the brachiopod crustaceans known as Artemias, can resist the osmotic power of salt.

Among the microorganisms resistant to salinity is the case of the bacteria B. marismortui, found in the Dead Sea.

Salting meat is a way to preserve it from bacterial action, since salt delays protein breakdown. To preserve food, sodium chloride extracts water from it, preventing the growth of bacteria.[4][5]​.

Various industrial uses

Sodium chloride is widely used, so even relatively minor applications can consume massive amounts. In oil and gas exploration, salt is an important component of drilling fluids in well drilling. It is used to flocculate and increase the density of drilling fluid to overcome high downhole gas pressures. Each time a drill hits a salt formation, salt is added to the drilling fluid to saturate the solution in order to minimize dissolution within the salt stratum.[3]​ Salt is also used to increase the curing of concrete in cemented casings.>.

In textiles and dry cleaning, salt is used as a brine rinse to separate organic contaminants, to promote "salting" of dye precipitates, and to mix with concentrated dyes to standardize them. One of its main functions is to provide positive ionic charge to promote the absorption of negatively charged ions from dyes.

It is also used in the processing of aluminum, beryllium, copper, steel and vanadium. In the paper and pulp industry, salt is used to bleach wood pulp. It is also used to make sodium chlorate, which is added along with sulfuric acid and water to make chlorine dioxide, an excellent oxygen-based bleaching chemical. The chlorine dioxide process, which originated in Germany after World War I, is increasingly popular due to environmental pressures to reduce or eliminate chlorinated bleach compounds. In tanning and leather treatment, salt is added to animal hides to inhibit microbial activity on the underside of the hides and to draw moisture back to the hides.

In rubber manufacturing, salt is used to make buna, neoprene, and white rubber. Brine and sulfuric acid are used to coagulate an emulsified latex made of chlorinated butadiene.[3]​.

Salt is also added to secure the soil and give firmness to the foundations on which highways are built. Salt acts to minimize the effects of displacement caused in the subsoil by humidity changes and traffic loading.

Sodium chloride is sometimes used as a cheap and safe desiccant due to its hygroscopic properties, making salting&action=edit&redlink=1 "Salting (foods) (not yet drafted)") a historically effective method of food preservation; Salt extracts water from bacteria through osmotic pressure, preventing them from reproducing, one of the main sources of food spoilage. Although there are more effective desiccants, few are safe for human ingestion.

ice melt

Sodium chloride in brine (the commercial mixture for a saturated solution reaches 270 g per liter) is the most used ice and snow flux in roads. As salt dissolves in water, its freezing point lowers. In contact with water it causes an endothermic reaction that requires heat input, which it takes from the environment or the contact surface, enthalpy, (ΔH= -385,820 KJ/mol).

The second most important application of salt is de-icing and anti-icing on roads, both in sand deposits and spread by winter service vehicles. In anticipation of snowfall, roads are optimally "anti-iced" with brine (a concentrated solution of salt in water), which prevents adhesion between the snow and the road surface. This procedure avoids the intensive use of salt after snowfall. For deicing, mixtures of brine and salt are used, sometimes with additional agents such as calcium chloride and/or magnesium chloride. The use of salt or brine becomes ineffective below −10 degrees Celsius (14 °F).

De-icing salt in the UK is predominantly sourced from a single Winsford mine in Cheshire. Prior to distribution, it is mixed with <100 ppm sodium ferrocyanide as an anti-caking agent, allowing the rock salt to flow freely out of the sandblasting vehicles despite having been stored prior to use. In recent years, this additive has also been used in table salt. Other additives have been used in road salt to reduce overall costs. In the US, for example, a carbohydrate solution byproduct of sugar beet processing was mixed with rock salt and adhered to road surfaces 40% better than loose rock salt. By spending more time on the road, the treatment did not have to be repeated multiple times, saving time and money.

In technical physicochemical terms, the minimum freezing point of a mixture of water and salt is −21.12 degrees Celsius (−6.0 °F) for 23.31% salt by weight. However, freezing near this concentration is so slow that the eutectic point of −22.4 degrees Celsius (−8.3 °F) can be reached with 25 wt% salt.

Road salt ends up in bodies of fresh water and could harm aquatic plants and animals by altering their ability to osmoregulate.[6]​ The ubiquity of salt poses a problem in any coastal coating application, as trapped salts cause major adhesion problems. Naval authorities and shipbuilders monitor salt concentrations on surfaces during construction. Maximum salt concentrations on surfaces depend on authority and application. The IMO regulations are the most widely used and set salt levels at a maximum of 50 mg/m of soluble salts measured as sodium chloride. These measurements are made using a Bresle test. Salinization (increased salinity, also known as freshwater salinization syndrome)) and the resulting increase in metal leaching is a constant problem throughout North America and in European fresh waterways.[7]​.

In road deicing, salt has been associated with corrosion of bridge decks, motor vehicles, reinforcing bars and wires, and unprotected steel structures used in road construction. Surface runoff, vehicle spray, and wind actions also affect soil, roadside vegetation, and local surface and groundwater supplies. Although evidence of environmental loading of salt has been found during peak use, spring rains and thaws often dilute sodium concentrations in the area where the salt was applied. A 2009 study found that approximately 70% of the road salt applied in the Minneapolis-Saint Paul metropolitan area is retained in the local watershed.[8]​.

Floors

Sodium is a non-essential nutrient for plants, which need it in very low doses. Exceptionally, certain groups of plants, such as C4 plants, or CAM, need higher doses of this element.

On the other hand, excess salt in the medium is harmful to most plants (salinity of the soil or substrate), since it causes their drying out by osmosis (water moves towards the most saline area). A characteristic symptom is burns on the edges of the leaves. Only plants called halophytes have developed a process that prevents this water loss.

Food industry and agriculture

Many microorganisms cannot live in a salty environment: water leaves their cells by osmosis. For this reason, salt is used to preserve some foods, such as bacon, fish or cabbage.

Salt is added to foods, either by the producer or the consumer, as a flavor enhancer, preservative, binder, fermentation control additive, texture control agent and color developer. Salt consumption in the food industry is subdivided, in descending order of consumption, into other food processing products, meat packaging, canning, baking, dairy products, and cereal milling. Salt is added to promote color development in bacon, ham and other processed meat products. As a preservative, salt inhibits the growth of bacteria. Salt acts as a binder in sausages to form a binding gel composed of meat, fat and moisture. Salt also acts as a flavor enhancer and tenderizer.

In many dairies, salt is added to cheese as a color, fermentation and texture controlling agent. The dairy subsector includes companies that manufacture cream butter, condensed and evaporated milk, frozen desserts, ice cream, natural and processed cheese, and specialty dairy products. In canning, salt is added primarily as a flavor enhancer and preservative. It is also used as a carrier for other ingredients, dehydrating agent, enzyme inhibitor and softener. In baking, salt is added to control the rate of fermentation of bread dough. It is also used to strengthen gluten (the elastic protein-water complex of certain doughs) and as a flavor enhancer, for example as a topping for baked products. The food processing category also includes milling products. These products consist of milling flour and rice and manufacturing breakfast cereals and blended or prepared flour. Salt is also used as a seasoning, for example in chips, pretzels, and dog and cat food.

Sodium chloride is used in veterinary medicine as an emesis-causing agent. It is administered as a hot saturated solution. Emesis can also be caused by the pharynx placing small amounts of common salt or salt crystals.

Medicine

It is the natural antidote to silver nitrate, metabolizing it into silver chloride, a practically non-toxic substance that the body can safely excrete.[9]​.

• - Salinity in the soil.