Basic Information:

Product name: Sodium Bromide

Molecular formula: NaBr

Molecular weight: 102.89

CAS No.: 7647-15-6

EC No.: 231-599-9

Packaging:  25kg/bag, 1000kg/bag etc

Preparation and application of sodium bromide

Sodium bromide (NaBr) is an important inorganic compound with various preparation methods and wide application fields.

Preparation method

1. Neutralization method: This is a common method of preparing sodium bromide, which can be achieved by the reaction of sodium hydroxide (NaOH) with hydrobromic acid (HBr).

- When using sodium carbonate (Na2CO3) as a raw material, it can react with hydrobromic acid to form sodium bromide.

- In the neutralization process, sodium bicarbonate (NaHCO3) can also be used as a raw material, through the neutralization reaction with hydrobromic acid to obtain sodium bromide solution, followed by concentration, cooling, filtration and drying steps to obtain anhydrous sodium bromide.

2. Reduction method: Urea reduction method is a method of converting bromine into sodium bromide under alkaline conditions, using urea as a reducing agent.

- In this process, sodium carbonate is dissolved in hot water, after adding urea, slowly add bromine, control the reaction temperature at 75-85℃, until the pH value reaches 6-7, to complete the preparation of sodium bromide.

3. Ion exchange method: Although the specific process of ion exchange method is not described in detail in the search results, it is a method of preparing sodium bromide by ion exchange resin.

Application field

1. Photographic industry: Sodium bromide is used to prepare film photographic solution and is an indispensable chemical in the photographic process.

2. Medical field: In medicine, sodium bromide is used in the production of diuretics and sedatives for the treatment of neurasthenia, nervous insomnia and other conditions.

3. Flavor industry: Sodium bromide is used in the production of synthetic flavors and is an important raw material for the manufacture of certain flavors.

4. Printing and dyeing industry: In the printing and dyeing industry, sodium bromide is used as a brominating agent to help improve the dyeing effect.

5. Analytical reagents: Sodium bromide can be used for trace determination of cadmium and other metal elements, is an important reagent in analytical chemistry.

6. Other industrial applications: Sodium bromide is also used in the electroplating industry, fire protection system, dye industry and other fields, as an additive or intermediate to improve product quality and performance.

Security and storage

Although sodium bromide is low toxic, it has certain irritants and needs to be properly stored and disposed of.

- Should be stored in a dry, cool, well-ventilated place, avoid contact with fire and heat sources, to prevent sunlight exposure.

- When handling, avoid ingestion, inhalation, and contact with skin and eyes to reduce health risks.

In summary, the preparation methods of sodium bromide mainly include neutralization method, reduction method, etc., and its application fields involve many aspects such as photographic industry, medicine, fragrance industry, printing and dyeing industry. In the operation and storage process, it is necessary to pay attention to safety precautions to ensure the health of personnel and environmental safety.

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