Halloween Chemistry

Learning chemistry doesn't have to be scary. Well, except on Halloween!

Pick your favorite creepy chemistry demo or activity and celebrate October 31 with some spooky science!

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  • Rainbow Fire Jack-o-Lantern
    Give your carved Halloween pumpkin a little oomph with a green fiery glow. It all starts with hand sanitizer.
  • Glow in the Dark Pumpkin
    It takes just one item to give your pumpkin a ghastly glow. Ready for a visit to the craft store? Tip: for a longer-lasting pumpkin, try artificial carvable pumpkins like these “Funkins.”
  • Spooky Halloween Jack-o-Lantern
    Here’s something new for your pumpkin to spew. It’s simple with a little dry ice.
  • Periodic Table of Pumpkins
    Have a lot of pumpkins on your hands? See what a team of university students decided to do.
  • Keeping a Jack-o-Lantern Fresh
    Looking for ideas on how to keep your cut pumpkin pristine? This science project can give you some ideas.

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  • Boo Bubbles
    Create soap bubbles filled with a swirling white fog. Find out how to get this ghostly effect.
  • Crystal Ball Bubble
    In my dry ice crystal ball I see… lots of great chemistry for your Halloween celebration this year!
  • Dry Ice Experiments
    Nothing says Halloween like a eerie stream of “smoke” from a cauldron. This link promises “ooze” and ahhhs with these demos.

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  • Periodic Table Costumes
    This could be one of the easiest chemistry Halloween costumes ever. Choose your symbol, grab a cardboard box, and personalize it to your element.
  • Halloween Chemistry Costumes
    It’s a chemistry Halloween masquerade. Can you identify the elements and compounds represented by these costumes?
  • Chemistry Costumes
    Can’t think of a thing to wear to the Halloween party? Why not try one of these creative (and cheap!) chemistry-themed costumes?


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  • Laundry Detergent Glowing Skull
    Your neighbors will be sure to admire your decorating skills when you create a glowing skull on the sidewalk or window.
  • Bag of Blood
    Stab a bag of “blood” without spilling a drop in this super easy Halloween twist on a classic demo.
  • Fake Blood Recipe
    Need to whip up a bowl or two of fake blood for the big Halloween night? Try these tips, and don’t be afraid to experiment!
  • Fake Flesh Recipe
    It’s edible fake flesh that you can make with stuff in your kitchen cupboards! There are even tips on how to make it more gruesome.
  • Frankenstein's Hand
    Frankenstein called and can’t make it to the party. Could he send just his hand instead? An acid–base reaction makes it come alive.
  • Halloween Feel Box Game
    Feels like… brains! Try this creepy but fun way to hone your observational skills, without peeking in the box.

  • Witches’ Brew Recipe
    Don’t forget a tasty beverage for your Halloween party! This brew carbonated with dry ice will quench the thirst of any ghoulish guest.
  • Halloween Science Treats
    Add glowing Jell-O in Halloween shapes to your party menu with this recipe.
  • Glowing Hand of Doom Punch
    Head to this haunted punchbowl and try a glass—if you dare.
  • Halloween Treats
    You’ll be happy to hear that pumpkins and chocolate have antimicrobial and antioxidant properties. Now, which would you rather eat first?

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  • Halloween Nassau Reaction
    This clock reaction is the perfect combination of colors for Halloween. It starts out colorless. Can you guess which two colors it turns?
  • Goldenrod Paper Message
    Who left behind the bloody handprint? Don’t worry—this chilling sight just comes from acid–base chemistry.
  • Genie in a Bottle
    Rub the bottle and ask this chemistry genie to come out and give you a wish for Halloween.
  • Giant Smoke Rings
    Send out these super-size smoke rings at your Halloween gathering.
  • Halloween Demo Show
    Combustion is the name of the game in this show’s series of 23 demos. Use their plan and patter, or adjust it how you like.

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  • A Halloween Story
    Riddle me this… How can I combine a mysterious riddle with great chemistry demos? This story might be your answer.
  • Static-Powered Dancing Ghost
    This ghost wants to dance but needs your help—your balloon’s help, that is.
  • Halloween Demos for AP?
    Looking to scare your AP students on Halloween? Check in with “fist pump baby” and learn how.
  • Halloween House
    Pay a virtual visit to a university’s chemistry-themed Halloween house to find some great ideas. It’s spooktacular!
  • Molecules from the Crypt
    Ah, the sweet smell of putrescine and cadaverine, ready for Halloween. Learn more about these compounds produced in decaying animals.