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Sodium Hypobromite: A Versatile Oxidizing道場

Sodium Hypobromite: A Versatile Oxidizing道場

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学問・研究
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2026年6月21日

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iridolls (道場主)

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Sodium hypobromite( NaOBr) is an inorganic compound that has garnered significant attention in both academic research and industrial applications. As the bromine analogue of sodium hypochlorite( common bleach), it possesses powerful oxidizing properties but offers unique reactivity and a distinct profile that makes it invaluable in specific contexts.

Its chemical formula is NaBrO, though it is most frequently encountered as the pentahydrate, NaOBr·5H₂O. This yellow-orange solid is highly soluble in water and features a monoclinic crystal structure, characterized by a Br– O bond length of 1.820Å.

Chemical Identity and Key Properties

Sodium hypobromite is a sodium salt of hypobromous acids. Its large reactivity and volatility define its character. A key challenge in working with NaOBr is its tendency to undergo disproportionation, slowly decomposing into the less reactive sodium bromide( NaBr) and sodium bromate( NaBrO₃).

3 NaOBr→ 2 NaBr+ NaBrO₃

This degradation is accelerated by heat and light, demanding that solutions be prepared new and used instantly, usually in situ, for optimum performance. The reagent's security and reaction are also heavily dependent on the pH of the answer. The active brominating agent can exist in two forms: the hypobromite ion( OBr⁻) in basic conditions and the more potent electrophile, hypobromous acid( HOBr), favored under acidic conditions.
https://www.echemi.com/sds/sodium-hypobromite-pd180521114772.html

【キーワード】 sodium、hypobromite

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