Bromic Acid - Bromic Acid

Japanese: 臭素酸 - シュウソサン

Bromine oxoacids include monooxobromate(I) acid, HBrO (commonly known as hypobromous acid), dioxobromate(III) acid, HBrO2 (commonly known as bromous acid), _{trioxobromate} (V) acid, HBrO3 (commonly known as bromic acid), and tetraoxobromate(VII) acid, _HBrO4 (commonly known as perbromic acid), all of which exist only as aqueous solutions. Of these, the term bromic acid refers to HBr _Ⅴ _O3 . _HBrO3 (128.91) is obtained from the filtrate of the reaction of barium bromate ^, Ba( _BrO3 ) ₂ , with sulfuric acid. When evaporated under reduced pressure at low temperatures, a viscous aqueous solution of about 50% is obtained. It is colorless when pure, but if left at room temperature it will partially decompose and turn pale yellow, so it should be stored at low temperatures. If heated above 40°C it will decompose, producing _Br2 and _O2 . It is a strong acid. It is a strong oxidizing agent, and will oxidize _H2S and _SO2 _to _H2SO4 , _H2O2 _to _O2 , and HCl, HBr, and HI to _Cl2 , _Br2 , and _I2, respectively. The oxidation reaction of HI proceeds quantitatively, so it is used in the quantitative analysis of bromate. It is used as an oxidizing agent in the intermediate process of dye synthesis reactions. It is hazardous to the skin and mucous membranes. Toxic. [CAS 7789-31-3]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

Japanese:

臭素のオキソ酸には，モノオキソ臭素(Ⅰ)酸HBrO(通称：次亜臭素酸(hypobromous acid))，ジオキソ臭素(Ⅲ)酸HBrO₂(通称：亜臭素酸(bromous acid))，トリオキソ臭素(Ⅴ)酸HBrO₃(通称：臭素酸)，テトラオキソ臭素(Ⅶ)酸HBrO₄(通称：過臭素酸(perbromic acid))があるが，いずれも水溶液としてのみ存在する．このなかで，単に臭素酸という場合にはHBr^Ⅴ O₃をさす．HBrO₃(128.91)は，臭素酸バリウムBa(BrO₃)₂と硫酸との反応濾液から得られる．低温で減圧蒸発濃縮すると，約50％程度の粘性のある水溶液が得られる．純粋なものは無色であるが，室温に放置すると，一部分解して淡黄色を帯びるので，低温で保存する．40 ℃ 以上に加熱すると分解し，Br₂ と O₂ を生じる．強酸性である．強い酸化剤で，H₂SやSO₂をH₂SO₄に，H₂O₂を O₂ に，HCl，HBr，HIをそれぞれ Cl₂，Br₂，I₂ に酸化する．HIの酸化反応は定量的に進行するので，臭素酸の定量分析に利用される．染料の合成反応の中間処理で酸化剤として用いられる．皮膚や粘膜をおかす．有毒．[CAS 7789-31-3]