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Innovating Science™ Disappearing Rainbow Products for Science Education

Use acids and bases with three indicators to create a rainbow of colors.

Manufacturer:  Innovating Science™ IS7039

Catalog No. S98653

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Includes: Materials for five demonstrations: 800mL Sodium Hydroxide solution; 50mL Sodium Hydroxide, 3M; 1L Hydrochloric Acid, 0.01M; violet, blue, green, yellow, orange and red indicators; and instructions



  • In a basic solution, phenolphtalein is red, p-nitrophenol is yellow and thymolphthalein is blue
  • These can be combined in various ways to create all the colors of the rainbow
  • If done correctly, students only see the acid or base being poured, adding to the impressive display



Use acids and bases with three indicators to create a rainbow of colors
25mL Red indicator UN1170, 25mL orange indicator UN1170, 25mL yellow indicator UN1170, 25mL green indicator UN1170, 25mL blue indicator UN1170, 25mL violet indicator UN1170, 2 x 30mL Hydrochloric Acid 1N UN1789, 2 x 30mL Sodium Hydroxide 1N UN1824, 30mL Sodium Hydroxide Sol 6M (6N) UN1824
Disappearing Rainbow Demonstration Kit
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