Sodium bromide is an important inorganic bromide, which is a white crystal or powder, easily soluble in water, chemically stable, and provides high-purity bromide ions. It is widely used in the fields of petrochemicals, photosensitive materials, organic synthesis, medicine, water treatment, printing and dyeing, flame retardancy, analysis and detection, and is an indispensable basic raw material in the industrial and chemical industries.
1、 Oil and gas industry (core industrial use)
      Used for preparing high-density drilling fluid, completion fluid, and workover fluid
In deep well, high-pressure, high-temperature, and unstable formation drilling, sodium bromide solution can be used to prepare high-density saline water (density up to 1.5-1.7 g/cm ³), balance formation pressure, prevent blowout, wellbore collapse, and prevent formation fluid invasion.
      Low corrosion, low solid phase, and minimal damage to oil and gas reservoirs. It can be compounded with calcium bromide and zinc bromide to form a high-density solid free saltwater system, suitable for complex working conditions such as high-temperature deep wells, shale gas, and tight oil.
      Preventing clay hydration and expansion, stabilizing wellbore walls, improving drilling efficiency and safety, protecting production layers, and enhancing recovery rates.
2、 Photographic material industry (traditional core use)
      Preparation of silver bromide emulsion for film, photographic paper, X-ray film, industrial inspection film
      Sodium bromide reacts with silver nitrate to produce silver bromide (AgBr), which is the core photosensitive material for traditional black and white film, color film, medical X-ray film, and industrial radiographic film.
      Silver bromide crystals are sensitive to light and form latent images under illumination, which are then developed and fixed to form images; There are still stable applications in fields such as medical imaging, industrial non-destructive testing, and traditional art photography.
3、 Organic Synthesis and Chemical Engineering (Basic Raw Material Applications)
      Bromide agents and bromine sources: As nucleophiles, they are used to synthesize organic bromides such as bromoethane, bromobenzene, and bromoalkanes, and participate in Finkelstein reactions, substitution reactions, etc.
      Pharmaceutical intermediates: used for synthesizing sedatives, anticonvulsants, antiepileptic drugs (such as bromide preparations) and various bromine containing raw materials.
      Dyes and Printing and Dyeing: As a brominating agent, it is used in the synthesis of reactive dyes, acid dyes, and mordant dyes to enhance dye color fastness and adhesion.
Synthetic fragrances: used for synthesizing fragrances containing bromine esters, ethers, etc., to improve aroma stability and retention effect.
      Flame retardant: As a bromine source, prepare bromine containing flame retardants for flame retardant treatment of plastics, rubber, textiles, and wood to enhance their fire resistance.
      Pesticide manufacturing: used for synthesizing intermediate compounds of bromine containing herbicides and insecticides such as glyphosate and bromobenzonitrile.
4、 In the field of medicine (mainly used for veterinary and synthetic purposes)
      Historical sedative anticonvulsant: Bromine ions inhibit the cerebral cortex and have been used to treat neurasthenia, insomnia, anxiety, and epilepsy; Due to its tendency to accumulate poisoning, it has been replaced by safer drugs and has been largely phased out in human clinical practice.
      Veterinary medicine: still used for animal medicine sedation, anticonvulsant, and anti stress preparations, suitable for auxiliary treatment of anxiety and epilepsy in livestock, poultry, and pets.
      Pharmaceutical synthesis: As a brominating agent, it synthesizes bromine containing drug intermediates, contrast agents, disinfectants, etc.
5、 Water treatment and environmental protection field
      Swimming Pool/Spa Disinfection: Compound with chlorine to generate hypobromic acid, which efficiently kills bacteria, inhibits algae, and prevents water odor. It has strong stability and low irritation.
      Industrial water treatment: used for sterilization and algae removal of circulating cooling water and oilfield reinjection water, inhibition of microbial sludge, and protection of pipelines and equipment.
      Wastewater treatment: As a de ink additive and heavy metal precipitant, it improves the de ink efficiency of waste paper and assists in the removal of heavy metal ions such as cadmium and lead from wastewater.
6、 Chemical analysis and laboratory reagents
      Analytical reagents: used for the detection and quantitative analysis of trace metal ions such as cadmium, silver, mercury, etc. (precipitation method, colorimetric method).
      Buffer solution: used as an electrolyte to prepare pH buffer system and ion strength regulator for chemical and biological experiments.
      Halogen analysis: used for the separation and identification of chloride, bromine, and iodide ions, and for the preparation of standard solutions.

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