Introduction to the properties and uses of hydrobromic acid

［Molecular formula］HBr

[Properties]Aqueous solution of hydrogen bromide, colorless or light yellow liquid, is one of the strong acids. It smokes slightly and turns dark when exposed to air or under the action of light due to the dissociation of bromine. It is irritating and miscible with water, acetic acid and ethanol. At 0°C, the saturated aqueous solution contains 68.85% hydrogen bromide. The boiling point of the boiling mixture of hydrobromic acid at 101325Pa (1 atmosphere) is 126°C, contains 47.5% hydrogen bromide, and has a relative density of 1.481. It has strong reducing properties and is corrosive to other metals except gold, platinum, barium and other metals. effect.

［Hydrobromic acidPurpose]Manufacturingsodium bromide,potassium bromide , Lithium bromide, Cobalt bromide, aluminum bromide,cesium bromide etc. inorganicbrominechemicals andbrominemethane,BromeEthane and other organic materialsBrome ChemicalBasicOriginalmaterial. PetroleumUsed in chemical industryAsAromatic compoundsAlkanesBased, coyoke Catalyst for diene isomerization; alkoxyyland BenzeneOxygen group Separating agent for compounds. Used in medicine to synthesize anesthetics and suppressantsZui et al. Also usedforSynthetic spices, dyes and solvents used as metal minerals /span>Agents, etc..

［Hydrobromic acidBriefPreparation method]

①The red phosphorus method and the sulfur dioxide method are commonly used. The red phosphorus method is to react red phosphorus with bromine to produce hydrobromic acid and phosphorous acid, which are then made into hydrobromic acid after sedimentation, filtration, and distillation. The sulfur dioxide method is to pass sulfur dioxide into a reaction kettle containing bromine and crushed ice, and distill the mixture. Add barium hydroxide solution to the evaporated liquid to react with the generated sulfuric acid, and obtain bromic acid after standing, filtering and distilling.

② Hydrobromic acid can also be produced by distilling a mixture of sodium bromide and 50% sulfuric acid.

[Safety and Protection] Hydrobromic acid is a secondary inorganic acidic corrosive substance. Hazard number: 93008. It is packed in plastic barrels or porcelain jars, with a net weight of 20kg per barrel. It is very sensitive to light and should be stored in a dark place and separated from alkalis. If spilled, rinse with water or alkaline water.

It may cause itching or even inflammation when in contact with the skin. Wash the skin immediately with water. Vapors can strongly irritate respiratory organs.