Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436

Mix milk of magnesia (MOM) with universal indicator and observe the dramatic rainbow of colors as the antacid dissolves in the simulated stomach acid! This is a great demonstration to teach concepts of acids and bases, solubility, solubility product constant and the Tyndall effect.


  • Biochemistry
  • Acids & Bases
  • Consumer chemistry
  • pH
  • Indicators
  • Physiology