Potassium Bromide Powder CAS 7758-02-3

Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of potassium bromide powder cas 7758-02-3 in China. Welcome to wholesale bulk high quality potassium bromide powder cas 7758-02-3 for sale here from our factory. Good service and reasonable price are available.

Potassium bromide powder is an inorganic substance with the chemical formula KBr. Colorless crystal or white powder with strong salty taste. The light color turns yellow, odorless, salty and slightly bitter. It is easy to turn yellow and slightly hygroscopic when exposed to light. Soluble in water and glycerin, slightly soluble in ethanol and ether. The aqueous solution is neutral. Its bromine ion can be replaced by fluorine and chlorine. It can react with sulfuric acid to generate hydrogen bromide. It reacts with silver nitrate to form yellow silver bromide precipitate.

Slightly hygroscopic. 1g is dissolved in 1.5ml water, and the aqueous solution is neutral. Irritating. It is mainly used for spectral analysis, drop analysis and determination of copper and silver, polarographic analysis of indium, cadmium and arsenic, and developer. It is used for making silver bromide paper, as well as analytical reagent, and medically as a psychoactive agent.

Potassium bromide is a typical ionic compound, which is completely ionized and neutral after being dissolved in water. Commonly used to provide bromine ions - the following important reactions can produce silver bromide for photography:

KBr(aq) + AgNO₃(aq) → AgBr(s) + KNO₃(aq)

Bromine ion Br - in aqueous solution can form complexes with some metal halides, such as:

2 KBr(aq) + CuBr₂(aq) → K₂[CuBr₄](aq)

The traditional preparation method is iron bromine method: first, use excessive bromine and iron filings to generate ferric tribromide octahydrate (Fe₃Br₈ · 16H₂O) in water, then act with the boiling potassium carbonate solution, filter out the ferric oxide precipitation, concentrate and crystallize to obtain:

4 K₂CO₃ + Fe₃Br₈ → 8 KBr + Fe₃O₄ + 4CO₂↑

Potassium bromide (KBr) is an important inorganic compound with a wide range of applications. It is a colorless cubic crystal or white particle or powder, odorless, salty and slightly bitter in taste, soluble in water, slightly soluble in ethanol, and insoluble in ether.

Sedative:

 

Potassium bromide is mainly used as a sedative in the pharmaceutical field to treat neurological disorders such as epilepsy and anxiety. The principle is that bromide ions can replace chloride ions in brain tissue, enhance the inhibitory effect of the cerebral cortex, and thus produce a sedative effect.
Specific examples:
Tribromide tablets: Potassium bromide is combined with other pharmaceutical ingredients to produce nerve sedatives such as tribromide tablets, which are used to treat neurasthenia, insomnia, mental excitement, hysteria, etc.
Epilepsy treatment: Potassium bromide is used as an anticonvulsant drug to alleviate spastic seizures caused by epilepsy, tetanus, and other conditions.

Other medicinal uses:

 

Potassium bromide can also be used to treat chronic bronchitis, alleviate bronchospasm, and so on. The principle is that potassium bromide can reduce vagal excitability, dilate bronchial smooth muscle, and alleviate symptoms during asthma attacks.
Specific examples:
Bronchitis treatment: Potassium bromide can be used to alleviate symptoms such as cough and sputum caused by chronic bronchitis, and improve patients' breathing difficulties.
Bronchial spasm relief: Potassium bromide is used to alleviate asthma attacks or prevent asthma exacerbation through nebulization inhalation and other methods.

Catalyzer:

 

Potassium bromide serves as a catalyst in the chemical industry and participates in various chemical reactions. Its catalytic activity helps to improve reaction rate and yield.
Specific examples:
Bromination of 1,3-dicarbonyl compounds: Potassium bromide, as a bromine source, participates in the environmentally friendly bromination reaction of 1,3-dicarbonyl compounds, generating corresponding brominated products.
The synthesis of aniline bromide: Potassium bromide catalyzes the bromination reaction of aniline to produce compounds such as aniline bromide, providing intermediates for drug synthesis.

Other chemical applications:

 

Potassium bromide can also be used as an analytical reagent, photosensitizer, flame retardant, etc.
Specific examples:
Analytical reagents: Potassium bromide is used in drop analysis to determine the content of copper and silver, and in polarographic analysis to determine the concentrations of indium, cadmium, and arsenic.

 

Photosensitive agent: Potassium bromide powder is one of the important raw materials for manufacturing photographic emulsions, photosensitive paper, and film, which can improve the sensitivity, contrast, and clarity of photosensitive materials.
Flame retardant: Potassium bromide can be used as a raw material or additive for flame retardants in the chemical industry, improving the flame retardant properties of materials such as polymers and cellulose.

 

Fertilizer:

Potassium bromide is used as a fertilizer in agriculture to provide potassium elements to plants and promote plant growth. Potassium is one of the essential nutrients for plant growth, which has a significant impact on plant growth, development, flowering, and fruiting.
Specific examples:
Wheat yield increase: Treating wheat seeds with potassium bromide solution can increase wheat yield.

 

 

For example, the Agricultural Technology Extension Station in Shan County, Zhejiang Province, used a 0.8% potassium bromide aqueous solution to flood rice seeds for 48 hours, resulting in a 14.6% increase in yield.
Rice yield increase: Treating rice seeds with potassium bromide solution can also increase rice yield. For example, the Institute of Plant Physiology of the Chinese Academy of Sciences flooded rice seeds with 0.8% potassium bromide solution for 48 hours, resulting in a 14.6% increase in yield.

Pesticides:

 

Potassium bromide can also be used as a pesticide for the prevention and control of pests and diseases. The principle is that potassium bromide has certain bactericidal and insecticidal effects, which can inhibit the growth and reproduction of pests and diseases.
Specific examples:
Disease and pest control: Potassium bromide is combined with other pesticide components to form a composite pesticide for the prevention and control of crop diseases and pests. For example, mixing potassium bromide with insecticides, fungicides, etc. can improve the effectiveness of prevention and control.

Photography field

Photographic material:

 

Potassium bromide is used as a photosensitive material in the field of photography, for manufacturing photosensitive films, developers, etc. Its photosensitive performance helps to improve the sensitivity and imaging quality of photographic materials.
Specific examples:
Photographic film manufacturing: Potassium bromide is one of the important raw materials for manufacturing photosensitive film, which can improve the sensitivity and contrast of the film.
Developer: Potassium bromide is used as a black and white developer, which can be used alone to prepare a low contrast developer. When used in combination with hydroquinone, many famous superadditions and formulations can be designed.

Other photography purposes:

 

Potassium bromide can also be used as a fixative, bleach, etc.
Specific examples:
Fixing solution: Potassium bromide and potassium ferrocyanide bleach work together to convert silver bromide into water-soluble silver thiosulfate sodium complex in the bleaching solution of color photosensitive material rinsing solution.
Bleach: Potassium bromide, as a bleaching agent, helps to remove unexposed silver bromide particles during the processing of color photosensitive materials, improving image clarity and color reproduction.

Efficiency leap Precision and stability

 

Potassium bromide is widely used in the preparation of optical materials due to its high transmittance and wide transmission band in infrared spectrometers, spectrophotometers, and the prism, transmission window, and lens of infrared devices.

Specific examples:
Infrared spectrometer: Potassium bromide pellet is the main method for preparing solid infrared samples. Spectral grade potassium bromide is an essential specialized reagent for infrared spectroscopy analysis.
Spectrophotometer: Potassium bromide, as a material for the spectrophotometer prism and transmission window, helps to improve the measurement accuracy and stability of the spectrophotometer.

 

Electronic materials

In the preparation of electronic materials, it can be used as a component of electrolytes to improve the performance and stability of batteries.
Specific examples:
Battery electrolyte: Potassium bromide, as a part of the electrolyte, helps to ensure the normal operation and stable performance of the battery. Especially in some high-temperature gravity batteries, the addition of potassium bromide can improve the temperature resistance and cycle life of the battery.

Preparation method of potassium bromide powder:

The potassium bromide synthesized from bromine and potassium hydroxide is dissolved in distilled water to prepare electrolyte. After electrolysis for 24h, the first batch of crude products is produced. After that, the crude products are taken every 12h. After the potassium bromide is removed by water washing, the crude products are distilled and hydrolyzed. A small amount of potassium hydroxide is added to adjust the pH value to 8. After heat preservation for 0.5h, the filter is filtered. The clarified filtrate is cooled to room temperature in the crystallizer. After crystallization, separation, drying, the potassium bromate product is prepared.

After the lime milk reacts with bromine, chlorine gas is introduced for chlorine oxidation reaction, and the reaction is terminated when the pH value reaches 6~7. After slag removal, evaporate the filtrate. The barium chloride solution is added to react to generate barium bromate precipitate, the filtered precipitate is suspended in water at a certain temperature and added to potassium carbonate for double decomposition reaction. The crude potassium bromate is washed with a small amount of distilled water for many times, and then filtered, evaporated, cooled, crystallized, separated, dried and crushed to obtain edible potassium bromate products.

With industrial bromine and potassium hydroxide as raw materials, potassium hydroxide is dissolved into a solution with 1.4 times the mass of water, and bromine is introduced with constant stirring. When bromine is added to a certain amount, white crystals will be separated to obtain crude potassium bromate.

Continue to add bromine until the liquid is pink. When bromine is added, cold water is constantly added to the solution to prevent bromine volatilization loss due to excessive temperature. Re crystallize repeatedly, filter, dry, and then dissolve it with deionized water. Add a small amount of potassium hydroxide to remove the excessive bromine during synthesis. Re crystallize once. Finally, take it out for crystallization and dry to get the finished product.

Hot Tags: potassium bromide powder cas 7758-02-3, suppliers, manufacturers, factory, wholesale, buy, price, bulk, for sale, Cerium sulfate powder, CHICAGO SKY BLUE 6B, 1 AMINO 2 NAPHTHOL 4 SULFONIC ACID, Consumable, Iridium III chloride