It's actually a mix of two different pH indicators: bromocresol green and methyl red.
它实际上是两种不同 pH 指示剂的混合物：溴甲酚绿和甲基红。
Bromocresol green
原声例句
Crash Course 综合篇
中文百科
溴甲酚绿
![](/Images/godic/202501/02/Bromocresol_green1352.png")
![Demostración del punto isosbestico de verde de bromocresol, en el cual las diferentes formas tienen la misma absorbancia.](/Images/godic/202501/02/Bromocresol_green_spectrum1353.png")
![Ball-and-stick model of the bromocresol green molecule in cyclic form](/Images/godic/202501/02/Bromocresol_green_cyclic_3D_ball1353.png")
![](/Images/godic/202501/02/Bromocresol_green_ionic_equilibrium1353.png")
溴甲酚绿（Bromocresol green，简称BCG)是一种三苯甲烷衍生类的染料，常作为指示剂。
外观为黄色晶体，其溶于乙酸乙酯、乙醇、乙醚和苯，微溶于水。
保存时，须干燥后方可密封。
英语百科
Bromocresol green 溴甲酚绿
![Skeletal formula of bromocresol green in cyclic form](/Images/godic/202501/02/Bromocresol_green1353.png")
Bromocresol green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes). It is used as a pH indicator in applications such as growth mediums for microorganisms and titrations.
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