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What are Glow Sticks?

Glow sticks use chemiluminescence to produce light.
Heating up a glow stick in a microwave will make it glow brighter.
Article Details
  • Originally Written By: Lorna W.
  • Revised By: A. Joseph
  • Edited By: L. S. Wynn
  • Last Modified Date: 10 April 2014
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    Conjecture Corporation
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Glow sticks are plastic cylinders that contain two liquids that temporarily create light when they are mixed together. The cylinders typically are about 4 to 5 inches (10 to 13 cm) long and less than 1 inch (2.54 cm) in diameter. Glow sticks are available in many colors and are often used for decoration or entertainment, such as at parties, concerts and other nighttime events. They also have some practical uses for camping, military or police operations, underwater activities or certain emergency situations. Thin glow sticks that are made of a more flexible plastic can take the form of necklaces, bracelets or other shapes.

Chemiluminescence

No matter what form they take, glow sticks depend on a chemical process known as chemiluminescence to produce their light. In chemiluminescence, a chemical reaction causes a release of energy. Electrons in the chemicals become excited and rise to a higher energy level. When the electrons drop back to their normal levels, they produce energy in the form of light.

Colors

The chemicals used to create this reaction in glow sticks usually are hydrogen peroxide and a mixture of phenyl oxalate ester and the fluorescent dye, or fluorophore, that gives the glow stick its color. Common colors of glow sticks include yellow, green, pink, blue and orange. They also are available in red, white, yellow-green and other shades and colors.

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How it Works

A glow stick's hydrogen peroxide is contained in a small glass or breakable plastic vial that floats within the mixture inside the stick. This is why the glow stick's user must bend it to make it start glowing. When the stick bends, the vial breaks, the hydrogen peroxide is released, the chemical reaction begins, and the distinctive glow appears. The chemicals that are used might be somewhat toxic, so if the glow stick itself breaks, it should be thrown away, and the chemicals that might have leaked out should be washed off the user's skin and any other surfaces with which they came into contact.

Duration

In addition to the color, the duration of the glow — usually several hours — also depends on the exact composition and quality of the chemicals inside. Some people say that a glow stick can be preserved by sticking it in a freezer. Indeed, cooling a glow stick will slow down the chemical reaction that is taking place inside it. The glow won't be as bright, but it will continue for a longer period of time.

Conversely, heating a glow stick, such as by placing it in a microwave, will speed up the chemical reaction. This will produce a brighter light. The glow won't last nearly as long, however, because the reaction will use up all of the available hydrogen peroxide more quickly. Microwaving glow sticks might not be recommended by some manufacturers, and caution should always be used when it is being done.

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Discuss this Article

hflippin1
Post 35

What type of chemical bonds are broken down when this reaction occurs?

anon273874
Post 34

Can you splatter some glow stick on a white T-shirt and keep it out for a certain amount of time so that it stays on the T-shirt?

anon146279
Post 30

This is a great website to do get info. This helped me greatly for my science fair.

anon142854
Post 29

Ok. I met a guy named crazy steve, and one camping trip this man opened a glowstick with an axe and drank it. he turned out fine so we chopped open like a bunch of them and got it all over ourselves. I'm pretty sure crazy steve drank more glowsticks, but my memory is "foggy".

anon131270
Post 28

what type of plastic are glow sticks made of?

anon124458
Post 27

Is there any color of glow stick that lasts longer than others? And if so, is there really enough of a difference to matter. It would be nice to only need one during a long Halloween.

anon122279
Post 26

I am trying to make glow sticks for my science fair project. i don know where to purchase phenyl oxalate ester. I also thought it would be a great idea for it because all the kids in my class would be amazed. So do you have any idea where to get phenyl oxalate ester?

anon85322
Post 22

anon54480 doesn't know what he/she is talking about. in small amounts, glow sticks aren't harmful to anything. and as for stains, they may stain with a faintly colored liquid but once it stops glowing, it will be hardly noticeable. At summer camp, my youth group broke and splattered glow sticks all over the interior of our cabin at 2:00 a.m. and nothing stained

anon79406
Post 21

Should one be worried if they get some on their skin? I used one and apparently it began leaking and I noticed a bit of green glowing "ink" so to speak on my fingertip. Is such a minor amount anything to worry about or no? Just curious.

Also, I am curious if say, these would be deemed safe for children as what if they chew on them and the stuff gets in their mouth or something. Just an afterthought really (I don't have kids but know these can be popular with them).

anon71378
Post 20

But what if -- what if we put the glow stick in the normal temperature? (6-6)

anon71377
Post 19

It was useful in my science fair!

anon69607
Post 18

I, like many other people, was doing a science fair project, and I always use this site, and it helps tremendously! thanks.

anon69319
Post 17

i spilled glow stick on my floor. how do you get that off?

anon67890
Post 16

For my science fair project I decided to do: Does the temperature affect the duration and intensity of the luminescence in glowsticks? This website was perfect! Thanks so much!

anon63070
Post 14

I have a science fair project and I need to know if you can take all of those chemicals and mix them together in a big pot to make the liquid inside the pot glow? can I do that with out getting hurt?

anon60198
Post 13

i have a science fair project and this really helped. thanks

anon55320
Post 12

Can this chemical cause harm to our environment? if it can, then how do we dispose of it in a proper way?

anon54480
Post 11

7: Glow stick liquid can cause cancer is toxic, corrosive and has a category 3 mutagen.

6: The liquid won't harm it that much but you don't want it to come into contact with your skin.

5: You cannot clean up the glow stick liquid once it has dried completely.

anon49062
Post 9

by keeping this in the fridge how do we know that the chemicals will not leak, as the plastic is subjected to thermal shock? is the plastic completely sealed like a vacuum tube?

anon28361
Post 7

What happens when the inside of the glow stick pops, and you get some in your mouth?

anon24697
Post 6

Does the liquid harm your skin if it comes in contact?

ejmiller
Post 5

How do you clean up the stuff inside when the glowstick breaks?? Its stained a hardwood floor and we need to clean it. HELPPPP!!

anon14617
Post 3

Is there a common household item or perhaps a drugstore available item that contains phenyl oxalate? or maybe somewhere one could obtain it?

anon5687
Post 2

how do you make glow sticks (specific details)?

anon1053
Post 1

Is this a single replacement reaction? Double Replacement?

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