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You are here: Home / Science / How Do Glow In the Dark Plastic Necklaces and Bracelets Work and What Is the Chemical Reaction Called?

How Do Glow In the Dark Plastic Necklaces and Bracelets Work and What Is the Chemical Reaction Called?

March 22, 2020 by Karen Hill

The necklaces and other temporary chemical lights work by imitating the chemical reaction called bioluminescence that allows fireflies to light up.

The reaction in the plastic tube is oxidation, as in burning, but the chemicals involved, called luciferins, produce more light than heat.

When the proper chemical is mixed with diluted hydrogen peroxide from a glass ampule in the tube, it generates dual carbon dioxide molecules, a compound called dioxetane dione.

This compound reacts in the presence of a fluorescer, or glow-producing chemical, to generate light plus carbon dioxide.

The reaction can continue until all the active components are consumed.

The nontoxic fluorescers used in American Cyanamid’s Lite-Up lightsticks are proprietary formulas.

People can prolong the light from their necklaces and bracelets by keeping them in the refrigerator, the company says.

As with all chemical reactions, chilling slows down the reaction and makes it last longer.

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Filed Under: Science

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

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