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Wikipedia definition
1. Thymol blueThymol 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. It transitions from red to yellow at pH 1.2–2.8 and from yellow to blue at pH 8.0–9.6.
Read “Thymol blue” on English Wikipedia
Read “チモールブルー” on Japanese Wikipedia
Read “Thymol blue” on DBpedia

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