Formula C27H30O5S | Pubchem 65565 | |
 | ||
Appearance Brownish-green crystal powder | ||
Thymol blue indicator
Thymol blue (thymolsulphonephthalein) is a brownish-green or reddish-brown crystalline powder that is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions.
Contents
It transitions from red to yellow at pH 1.2–2.8 and from yellow to blue at pH 8.0–9.6. It is usually a component of Universal indicator.
Thymol blue ph test kit tk9902 z
Structures
Thymol blue has different structures at different pH.
Safety
It may cause irritation. Its toxicological properties have not been fully investigated.
References
Thymol blue Wikipedia(Text) CC BY-SA