溴百里酚蓝 Bromothymol blue
（重定向自Bromothymol）
溴百里酚蓝（中文译名颇多：溴瑞香草蓝、溴瑞香草酚蓝、溴化麝香草酚蓝、溴麝香草酚兰、溴麝香草酚蓝、溴芮香草蓝、溴百里酚蓝指示剂，又名酒精蓝色指示剂）是测定弱酸弱碱时使用的一种指示剂，其酸性时为黄色，碱性时为蓝色。
其酸碱平衡为：
- C27H28Br2O5S ⇌ H + C27H27Br2O5S
溴百里酚蓝的pKa为7.10。
Bromothymol
中文百科
英语百科
Bromothymol blue 溴百里酚蓝
（重定向自Bromothymol）
Bromothymol blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the presence of carbonic acid in a liquid. It is typically sold in solid form as the sodium salt of the acid indicator.
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