Potassium bromate represented by the chemical formula KBrO3 or BrKO3  is a white crystalline powder that is soluble in water. It is a potassium and bromate salt and an ionic compound [2, 3]. It is a Lewis acid/base generic complex and a strong oxidizing agent .
Potassium Bromate Identification
|CAS Number||7758-01-2 |
|PubChem CID||23673461 |
|ChemSpider ID||22852 |
|EC Number||231-829-8 |
How to Make It
Potassium bromate can be prepared by passing bromine through a hot solution of potassium hydroxide. The products also include potassium bromide and water .
3Br2 + 6KOH = KBrO3 + 5KBr + 3H2O
Properties and Characteristics of Potassium Bromate
|Molar mass/molecular weight||166.999 g/mol |
|Color/appearance||White crystals or granules |
|Melting point/freezing point||350°C, 662°F |
|Boiling point||370°C, 698°F |
|Density||3.27 g cm-3 |
|State of matter at room temperature (normal phase)||Solid |
|Solubility in water||70 g/l (at 20oC) |
|pH||5 – 9 (25°C, 5%) |
|Crystal structure||Trigonal bipyramidal |
Heating the compound to a temperature above 434°C causes it to thermally decompose into potassium bromide and oxygen .
2KBrO3 = 2KBr + 3O2
Potassium Bromate Uses
- As a flour and bread improver in baking. It strengthens the dough and allows higher rising .
- In producing malt barley .
- In analytical chemistry .
- Being an effective brominating agent, KBrO3 in sulfuric acid is used to brominate benzene .
Is It Dangerous
KBrO3 is carcinogenic (causing DNA damage), neurotoxic and nephrotoxic if ingested. The compound can lead to hyperuricemia and follicular cell tumors of the thyroid. The harmful effects have led to many countries banning its use as a food additive. Inhalation and contact with eyes and skin should be avoided since it can cause severe irritation and damage. It may cause a fire hazard when brought in contact with organic material .
Potassium Bromate (KBrO3) Price
5 gram of the compound costs around $29.7 .
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- The thermal decomposition of potassium bromate – Chemiday.com