zeba
I have bought BTB from a supplier and it is orange in colour. Hence i am not quite sure if this the right colour or should it be blue as i have used in the past?
Bromothymol blue
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replied to: zeba
jwalsh
Replied to: I have bought BTB from a supplier and it is orange...
The orange color indicates a pH acidic solution. The blue color indicates a pH alkaline solution. If it were green, the pH would be neutral.