BSCI 424 — PATHOGENIC MICROBIOLOGY — Fall 2000


pH Indicators

 

 

Description of Common pH Indicators


Bromcresol Purple


Yellow at pH < 5.2


Purple at pH > 6.8


Bromthymol Blue


Green at pH < 7.0


Deep blue at pH >7.6


Neutral Red


Red at pH < 6.8


Colorless at pH > 6.8


Phenol Red


Yellow at pH < 6.8


Red at pH > 6.8


 

 

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Designed & Maintained by David M. Rollins
Copyright © 2000, D.M. Rollins and S.W. Joseph
Revised: August 2000
URL: http://life.umd.edu/classroom/bsci424