Sodium bromide

Sodium bromide is a colorless cubic crystal or white granular powder. Odorless, salty, and slightly bitter. It is easily soluble in water (the solubility is 121g/100ml water at 100°C). Slightly soluble in alcohol.

Sodium bromide is a colorless cubic crystal or white granular powder at room temperature. It belongs to the equiaxed crystal system. It is odorless, tastes alkaline and slightly bitter, and is highly toxic. It is easy to absorb water and agglomerate in the air, but it is not deliquescent, slightly soluble in alcohol, and easily soluble in water (the solubility in 100ml water at 100°C is 121g). Its aqueous solution is neutral and conductive. Anhydrous sodium bromide crystals precipitate in the solution at 51°C, and dihydrate is formed below 51°C. The bromide ion can be replaced by fluorine and chlorine. Under acidic conditions, it can be oxidized by oxygen to liberate bromine. Industrial use of this feature to produce bromine. It can react with dilute sulfuric acid to generate hydrogen bromide. However, hydrobromic acid is a strong acid. Dilute sulfuric acid cannot be used to participate in the reaction. Only high-boiling acid can be used to prepare low-boiling acid. However, concentrated sulfuric acid cannot be used. Because concentrated sulfuric acid has strong oxidizing properties, it will oxidize -1 valent bromine. It becomes a simple substance of bromine and emits a reddish-brown gas. This method can be used to identify sodium iodide (sodium iodide and concentrated sulfuric acid are heated to release a purple-red gas), so only concentrated phosphoric acid and sodium bromide can be heated to produce bromine. Hydrogen. Bromide ions can strengthen the inhibitory process of the cerebral cortex and promote its concentration. Medically, it can be used as a tranquilizer, hypnotic, or anticonvulsant. When a person swallows or inhales the compound, it will cause damage to the central nervous system, brain, and eyes. It will also irritate the skin, eyes, and respiratory tract.

The product uses and application fields of sodium bromide

[Use 1] Used as an analytical reagent, and also used in the synthesis of inorganic and organic compounds and the pharmaceutical industry.
[Use 2] Used as a raw material for the preparation of film photosensitive liquid, a sedative in medicine, a brominating agent in the printing and dyeing industry, and also used in the synthesis of perfumes and other chemicals.
[Use three] The photosensitive industry is used to prepare film photosensitive liquid. It is used in medicine to produce diuretics and tranquilizers. Used in the perfume industry to produce synthetic perfumes. Used as a brominating agent in the printing and dyeing industry. In addition, it is also used in organic synthesis and other aspects.
[Use 4] Used in photosensitive industry, perfume, medicine, printing and dyeing industry, etc.
[Usage 5] Analytical reagent, spot titration analysis of cadmium, manufacture bromide. Used to make a photosensitive film. It is used as a diuretic and sedative in medicine to strengthen the inhibitory process of the cerebral cortex. It is used as a brominating agent in synthetic perfume, medicine, and dye industries. Usually also used as a chemical reagent.

Sodium bromide preparation method

Urea Reduction Method
The soda ash (sodium carbonate) and urea are dissolved in hot water and sent to the reactor, and bromine is slowly added to react to generate sodium bromide. Then, activated carbon is added for decolorization, filtered, evaporated and crystallized, centrifuged, and dried to obtain the sodium bromide product. That 3Br2+3Na2CO3+NH2CONH2→6NaBr+4CO2↑+N2↑+2H2O
Neutralization
Add about 40% of hydrobromic acid to the reactor, slowly add 40% caustic soda solution under stirring to neutralize, and when it reaches Ph7.5-8, sodium bromide will be generated. After centrifugal separation, evaporation, crystallization, and centrifugal separation, the preparation of Sodium bromide product is obtained. That HBr+NaOH→NaBr+H2O