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| Names | |
|---|---|
| IUPAC name Sodium hypobromite | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.034.096 |
| EC Number |
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| UNII | |
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| Properties | |
| NaOBr | |
| Molar mass | 118.893 g·mol−1 |
| Appearance | orange solid |
| Related compounds | |
Otheranions | |
Related compounds | Hypobromous acid |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Sodium hypobromite is aninorganic compound with thechemical formulaNaOBr. It is asodiumsalt ofhypobromous acid. It consists of sodiumcationsNa+ andhypobromiteanions−OBr. It is usually obtained as thepentahydrate, so the compound that is usually called sodium hypobromite actually has the formulaNaOBr·5H2O. It is a yellow-orange solid that is soluble in water. It adopts amonoclinic crystal structure with a Br–O bond length of 1.820 Å.[1] It is thebromine analogue ofsodium hypochlorite, the active ingredient in commonbleach. In practice the salt is usually encountered as anaqueous solution.
Sodium hypobromite arises by treatment of aqueous solution of bromine withbase:[2]
It can be preparedin situ for use as areagent, such as in the synthesis of3-aminopyridine fromnicotinamide[3] (Hofmann rearrangement).
Sodium hypobromite slowlydisproportionates tosodium bromide andsodium bromate:
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