Briefly introduce what sodium bromide is

Sources：www.worldbrom.com | PublishDate：2025.10.22

Sodium bromide is a colorless cubic crystal or white granular inorganic compound with the chemical formula NaBr. It has a wide range of applications in medicine, industry, photography, and other fields.
1. Basic attributes
Chemical composition: Composed of sodium ions (Na ⁺) and bromide ions (Br ⁻), it is a typical ionic compound.
Physical properties: soluble in water, neutral in aqueous solution; It is easy to absorb moisture and deliquescence in the air, and can melt at high temperatures. The molten state can conduct electricity.
Preparation method: In industry, it is usually prepared by neutralizing sodium hydroxide with hydrobromic acid, or by reacting bromine with sodium compounds such as sodium carbonate and sodium sulfate.
2. Main purpose
In the field of medicine, it was once used as a sedative hypnotic drug to treat symptoms such as neurasthenia and insomnia, but its application has decreased due to safety and other factors; It is also an important raw material for the preparation of other bromides, such as potassium bromide and silver bromide.
In the industrial field, it is used as an analytical reagent to determine the content of certain substances in chemical analysis; It can also be used as an intermediate for the preparation of organic bromine compounds and participate in various organic synthesis reactions.
Photography field: It is an important component of emulsions in traditional film photography. Sodium bromide reacts with silver nitrate to produce silver bromide, which has photosensitivity and can be used to make photosensitive films and paper.
Other fields: Used as an additive for completion fluids in petroleum drilling, regulating drilling fluid density; It can also be used for water treatment, as a fungicide and disinfectant.

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