Indicator, Reagent, or Diagnostic Aid
bromthymol blue
Subclass of:
Tosyl Compounds; Toluene; Thymol
Definitions related to bromthymol blue:
  • A dye used as an indicator in determining pH. Bromthymol blue is a weak acid. It can be in acid or base form, depending on the pH of the solution. This reagent is yellow in acidic solutions, blue in basic solutions and green in neutral solution.
    NCI
    U.S. National Cancer Institute, 2021
  • A pH sensitive dye that has been used as an indicator in many laboratory reactions.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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