Science, Tech, Math › Science How Pop Rocks Candy Works Share Flipboard Email Print Kristi Bradshaw/CC/Flickr Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated November 20, 2019 Pop Rocks are a cool candy that pops when you put them in your mouth. They make a sizzling sound as they dissolve, the tiny explosions feel interesting, plus (in my opinion) they taste good. There was an urban legend that Mikey, the kid from the Life cereal ads who won't eat anything, ate Pop Rocks and washed them down with cola, and then died when his stomach exploded. It's completely untrue. If you swallow a handful of Pop Rocks and chug a soda, you'll probably burp, but you won't die. If Mikey barely tried Life cereal, why would he eat Pop Rocks anyway? How exactly do Pop Rocks work? How Pop Rocks Work Pop Rocks are a hard candy that has been gasified with carbon dioxide using a patented process. Pop Rocks are made by mixing sugar, lactose, corn syrup, water, and artificial colors/flavors. The solution is heated until the water boils off and combined with carbon dioxide gas at about 600 pounds per square inch (psi). When the pressure is released, the candy shatters into small pieces, each containing bubbles of pressurized gas. If you examine the candy with a magnifying glass, you can see the tiny bubbles of trapped carbon dioxide. When you put Pop Rocks in your mouth, your saliva dissolves the candy, allowing the pressurized carbon dioxide to escape. It's the popping of the pressurized bubbles that makes the sizzling sound and shoots pieces of candy around in your mouth. Are Pop Rocks Dangerous? The amount of carbon dioxide released by a packet of Pop Rocks is about 1/10th as much as you would get in a mouthful of cola. Except for the carbon dioxide, the ingredients are the same as those of any hard candy. The popping of the bubbles is dramatic, but you won't shoot candy into your lungs or chip a tooth or anything. They are completely safe, though I doubt the artificial colors and flavors are particularly good for you.