Phenol Red and Bromothymol Blue

Explore acids and bases, and gain experience using real-life indicators.
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Have a colourful day with these bright shades at play.

Nature as the artist uses acid and bases as its palette. Flower petals, lichens, shells, sand and feathers all obtain their colour from chemicals like acid and bases.

Use Phenol Red as an indicator and watch the colour changes appear like magic - shades of yellow, pink or red depending on the acidity of the substance you're testing.

Bromothymol Blue turns Australia's favourite colours - green and gold - when mixed with different substances depending on their pH.

Explore acids and bases, and gain experience using real-life indicators, Bromthymol Blue, and Phenol Red which is regularly used to test pH in spas and swimming pools.

Age: 9+ with adult supervision

What You Get

Phenol Red & Bromthymol Blue Indicator Set

Kit Contents

  • 28 grams of phenol red solution
  • 28 grams of bromothymol blue solution
  • 5 grams of citric acid
  • 5 grams of sodium carbonate
  • 1 beaker
  • 1 scoop
  • Cups
  • Sticks
  • Pipettes
  • Instructions

What is an acid?

An acidic solution, like vinegar, contains an excess of hydrogen ions (H+), and a basic solution like soap, contains and excess of hydroxyl ions (OH-).


  • Acids and Bases
  • Indicators

WARNING: CHOKING HAZARD - Small Parts. Not for children under 3 years.

More Information
Length (cm) 14
Width (cm) 14
Height (cm) 28
Age Group 9-10 Years, 11-12 Years, 12+ Years
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