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Sodium Chloride
Time2018-8-3 16:46:10Page view746

Sodium chloride is an ionic compound with the chemical formula NaCl. It is a colorless cubic crystal or a fine crystalline powder with a salty taste. The appearance is white crystal, and its source is mainly seawater, which is the main component of table salt. Soluble in water, glycerin, slightly soluble in ethanol (alcohol), liquid ammonia; insoluble in concentrated hydrochloric acid. Impure sodium chloride is deliquescent in air. [1] The stability is relatively good, and its aqueous solution is neutral. Industrially, the method of electrolytically saturated sodium chloride solution is generally used to produce hydrogen, chlorine and caustic soda (sodium hydroxide) and other chemical products (commonly called chlor-alkali industry). It can be used in ore smelting (electrolytic melting of sodium chloride crystals to produce active metal sodium), medically used to configure physiological saline, and daily life can be used for condiments.
Chinese name sodium chloride English name Sodium chloride
Chemical formula NaCl
Molecular weight 58.44
Content 99.5%
CAS Registry Number
EINECS accession number 231-590-3
Melting point: 801
Boiling point: 1465
Water-soluble and easily soluble in water, solubility 35.9g (room temperature)
Density: 2.165g / cm³ (25 C)
Exterior white crystal
Exact mass: 57.95860
Density: 2.165g / cm³ (25 C)
Refractive index: 1.378
Water solubility: 360 g / L (25 ºC)
Vapor pressure: 1 mm Hg (865 C)
Melting point: 801 C
Boiling point: 1465
Sodium chloride is a white odorless crystalline powder. It has a melting point of 801 C and a boiling point of 1465 C. It is slightly soluble in ethanol, propanol and butane. It becomes a plasma after being miscible with butane. NaCl is dispersed in alcohol to form colloids. Its solubility in water is reduced by the presence of hydrogen chloride, and it is almost insoluble in concentrated hydrochloric acid. No odor and salty, easy to deliquescent. Soluble in water, soluble in glycerin, almost insoluble in ether
The seawater (average of 2.4% sodium chloride) was introduced into the salt field, dried in the sun, concentrated and crystallized to obtain a crude product. The seawater can also be heated by steam, filtered by a sand filter, and concentrated by ion exchange membrane electrodialysis to obtain brine (containing sodium chloride 160-180g / L). The halo gypsum is precipitated by evaporation, and the obtained chlorine More than 95% sodium (2% moisture) can be dried to obtain common salt. Rock salt and salt lake brine can also be used as raw materials and dried in the sun to obtain raw salt. When underground brine and well salt are used as raw materials, it is concentrated by three-effect or four-effect evaporation, crystals are precipitated, and centrifuged.
When the sodium chloride aqueous solution is electrolyzed, hydrogen gas and chlorine gas are generated. Chlorine gas has a wide range of applications in the chemical industry. It can be used to synthesize polyvinyl chloride, pesticides, hydrochloric acid, etc.
The food industry and fisheries are used for salting, as well as raw materials for seasonings and refined table salt.
Adding salt to cooking dishes can remove some odors of raw materials and increase the taste, which is the effect of salt freshness. "Slightly tasteless, salty and tasteless" means that the proper amount of salt can be used to exert its unique functions.
Sodium chloride is very important for life on Earth. Most biological tissues contain multiple salts. The concentration of sodium in the blood is directly related to the regulation of the safe level of body fluids. The conduction of nerve impulses caused by signal conversion is also regulated by sodium ions.
Water containing 0.9% sodium chloride is called saline because it has the same osmotic pressure as plasma. Normal saline is the main body fluid substitute. It is widely used in the treatment and prevention of dehydration, and it is also used in the treatment of intravenous injection and the prevention of blood loss shock.
It is used for smelting ore, making condiments, medically used for intravenous injection, industrial raw materials, and road snow removal.
Packing: 50KG / bag

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