Mark Rober's Secret Devil's Toothpaste Recipe Revealed 

“I knew that I went to far but only by going to far can you find how far you *can* go.” Spoken like a true mad scientist.

I don't even plan to make this. I just needed to know how to make it because Mark tried to hide it. Classic Streisand 😋😈

Elias, congrats. The ChemTalk team has been talking about this same experiment, and we also suspected the 50% H2O2 plus KI combination. We knew KI was a likely candidate because of its lower toxicity and easier clean-up which would be attractive to Rober's team. Based on your experiments, we feel fairly certain that you are correct. Excellent job on this video, and we hope you had fun trying to contain the foam that almost flew away. As always, looking forward to the next video.

very impressive, well done!

"Only when you go too far can you know how far you can go". Love that 'mad scientist' accent.

You rock! I was trying to figure out how they did it and I'm so happy to see that you had figured it out!

Thanks. Another parent from a local homeschool group was talking about possibly doing a devils toothpaste demo sometime next year, and I was so confused because Mark Rober didn't reveal the recipe and I just had to find out if anyone even knew it before asking more. I bet they or their spouse are teachers at the local university if they know how to get hold of that concentration of hydrogen peroxide. I'll ask about all the safety precautions to be extra sure, but I imagine if they know how to get hold of the chemicals, they're familiar enough with chemistry to take the proper precautions without my needing to. I hope someone has a good infrared thermometer and we can compare the heat output of the 2 reactions. This would be a good opportunity to talk about why the heat forms and whats happening on a molecular level.

Nice video. Thanks for figuring it out for us non chemists.

Honestly while it did look very similar Marks explosion looked like it was denser and closer to a liquid state rather then being fluffy and looser looking. While I think you did a great job in getting it very close to his recipe I think there's still something missing... It may just be a natural variation that happens by chance, but if I'm not mistaken once Marks recipe reacted it stopped reacting pretty quickly rather then continuing the reaction for some extra time after like yours did. It's very possible my observations are wrong as it might just be that Mark didn't give enough of a look at how long his reaction would last and only showed the initial reaction, but I suspect there's something else in the mix to ensure the reaction happens as quickly as possible so after the initial expansion there wouldn't be anything left to continue reacting afterwords due to it having reacted all at once. I could very easily be wrong, but that's just what it looks like to me especially looking at the comparison shot in your vid with them side by side.

An impressive, and humorous, investigation - proving, once again, that the simplest answer is most often the correct one. Having subscribed after finding your solution in this video, I'm looking forward to more of them.

When I tell you I was looking for the recipe for WEEKS I mean WEEKS thank you so much I really appreciate your hard work we all do to be honest

Great job in reverse engineering that experiment! It takes balls to concentrate H2O2 up to and over 60% & the dangers of it exploding spontaneously are very real above 70%. Like yourself, I was intrigued by Mark's results & set out to uncover the secret recipe, i was able to do it in a different way though by using sodium iodide dissolved in hot water to saturation & chilled 35% peroxide. If you get an opportunity, you should give it a try as well to confirm my findings. Good luck & keep up the good work, stay safe. Fyi-I chilled the peroxide so that there was time to fully add the sodium concentrate & yeild a complete reaction else most of it would get pushed out in the initial foam onto the ground.

"I knew that I went too far, but only when you go too far you know how far you can go"

this is one of the best videos I have seen in a while. I have been looking for this recipe for a long time.

sometimes, too far is just barely far enough

Great video, Elias. And I would guess that Mark Rober would applaud you. Keep it up with good videos to share with us.

I was thinking that he was using hot peroxide and potassium iodide, because in one of the shots when they were pouring the barrels it was fuming. I guess it could be more concentrated and also heated up.

I think this was the most adorably presented science I ever did see.

Congratulations and well done. From brazil here. The oxygenwayher it's a 200 percent?

*_" Mark Rober's Lawyer wants to know your location "_*

Mark is such a cool guy. I would say he probably bleeped out the recipe so kids didn’t try to do it cause that could go horribly wrong

as i'm clicking subscribe you have 999 subscribers, so congratz on 1000 subscribers

Amazing! Surprised no one did it sooner :)

Love the video, just to be clear, when you say 600gram 50% KI you mean 600grams of KI mixed in a solution of 50% water and 50% KI?

I do it with KI powder in my classroom, now I'll try it with KI solution!! My cleaner thanks you in advance.

haha senior pranks will get alittle more interesting this year

How do you clean up that much elephants toothpaste? Is there a trick to it

Thanks friend! I eagerly await being on a watchlist.

Hmmm, luckily I can buy 50% H2O2 straight off the store shelf in Australia

Very cool! You cracked the code amazingly

If I had a nickel for each time the hidden secret ingredient for a chemistry demonstration was Hydrogen peroxide, I'd have 2 nickels. That isn't a lot and it's actually not that surprising that it happened twice.

Good Job !! Live long and prosper.... you brighten our days and make curiosity great again ;))

Is the potassium iodine Solution Calculated in volume or weight.

"Please don't fly away!" XD I Love you.

Edit* When you know what you are doing and only small amounts(like a drop)! Do not ever use this(and other dangerous) chemical when you haven't studied chemistry at an university! Can't stress this enough. Not very nasty. Even if it touches skin, it turns white for a day but other than that it's useful for many things in chemistry. Urea peroxide for example. Also, 50% peroxide is sold in some countries.

i wanna ask woh much time does it take to evaporate the hydoren poroxide and if i can just put it in the oven in like 100 or 80 degrees and alsow if can explode by itselve if its too hot?

Now we need 100 percent H2O2.

Your a smart Dude !! Goodluck in your Adventures!!!

50% hydrogen peroxide is easy to get here in Thailand, just a few bucks for a big bottle. But our potassium iodide comes in powder form.... Could I add the powder as is? Or could I add it to warm water to make a solution? I'm just a mom wanting to do the experiment for my kids (after testing from a safe distance of course)

Thank you for putting this together.

Having found your favoured peroxide/reagent ratio, have you tried better bubbling agents than dish soap? There are many better, from pro kids entertainer bubble mixes to those used in gastronomy. A firmer, more stable bubble structure will capture more of the rxn I'd guess?

airport security boutta be absolutely flabbergasted😈

This was dope, excellent work.

I looked at the differences and the similarities and I figured out that yours is slightly over in the hydrogen peroxide. So maybe like 45%- 50% would be more accurate because his falls a lot quicker and rises later than yours.

ima use this for my science fair project

Dr. Strangelove is doing party tricks!

3:40 and this is why you dont mix chemicals at home, especially without observing proper protocol and procedures. Because even people who DO know what they’re doing, as shown here, can for lack of a better presentation, “create a monster they can’t completely control” The last thing you want on your tombstone/court papers is “cause of death/destruction: people actually let them cook”

I hope this video doesnt gets demonitzed

well done bro.. really hardwork

I've been wondering about this - great video!

I was wondering where you get the potassium iodide? I tried looking it up and nuclear fallout protection stuff comes up. Is that what you used?

Very good , you are very talented and intelligent ,keep it up.your channel will blow up soon!

Only when you go too far you know how far you can go!

mark is like, Hmm what now, they discovered the devils toothpaste, oh i know, hells toothpaste or no, satans toothpaste, no maybe hells toothpaste

The stuf that flew away could be called "Angels Toothpaste" describing how it floats.

This is impressive

I feel like this video is gonna blow up at some point edit: yeah it did

We need more people interested and learning about chemicals

In the US, you can actually buy 50% peroxide and it’s pretty much the strongest concentration I can find from chemical suppliers. I’d assume that he purchased from one particular distributor but I will not say names 🤫

Backyard scientist mentioned he concentrated peroxide, by putting it in a bit of water and letting the water evaperate into the air...and repeating.

Your recipe is likely closer to the original recipe by Mark Rober, but have you tried mixing H2O2 and NaOCl? This would likely produce a similar reaction(although not as long-lasting) to the Devil's toothpaste, with lower concentrations of both chemicals, as they are both strong oxidisers, which produce lots of oxygen very quickly when mixed. It's also cheaper that using KI as catalyst.

Above 70% it gets hot enough to boil the remaining 30% water into steam. Steam is lighter than air, so it rises.

man you derserve a subscribe

Ich habe eine Frage bezüglich der Seife: ist das Natriumlaurentylsulfat der einzige Stoff der von der Seife reagiert? Also könnte man theoretisch auch einfach direkt nur Natriumlaurentylsulfat nehmen

Absolute G for doing this.

Thank you so much for this! I’ve been looking for this for ever

Thank you we are home school group of 10-year-old boys that really want to see an explosion don't worry we'll be safe seriously. Smiling. We really do appreciate this. How else do young scientists develop?! We have adult supervision

What did you use for the other half of the patassuim iodide

I think its 50% H2O2+KI+Dish soap and food coluring and that "something else" is Catalase as it decomposes H2O2 the fastest,and its colorless and non toxic.

very good

Wow very underrated

See, now I'm wondering what happens at 70% concentration.

This is soo cool :) can you point out some source to increase the concentration from 35% to 50%? I would love to recreate this!

I’ve seen RU-vid videos on concentrating hydrogen peroxide, but since I can only get my hands on 3% I haven’t bothered trying to reproduce their results.

I love all your videos so much never stop uploading

Thanks for the recipe. A 50% solution isn't that hard to cook up from my stock solution.

I hypothesized that they used a different catalyst which contributed to the gas evolution

thank you, this is gonna be my science project.

You can get 30% peroxide gallons from cosmology supply stores.

I feel like mark rober used the following: Hydrogen peroxide Potassium Soda Soap Mentos

Good work!!!

Make this guy famous

Underrated

He made another record of devils toothpaste....

Can i use yeast for KI solution instead? How that will affect the results?

Imagine if Mark Rober saw this

Very cool, how did you clean this mess up?

Pleaaaassse don't fly away Pleeeaaaasse come back!

I know a way to combine these mixtures to get 100% mixing that would give an insane reaction and elevation!

Who was that they were going to see Mark rober in the comments like "well played"

Its expensive to get potassium iodide were I live, but I can get potassium permanganate cheaply and easily - would that work as a catalyst?

What a madlad

and 1 more question. how did u make the 50% Hydrogen Peroxide. and how do u prevent it from going to be gas

Hi. As I understood, you said 600 grams of KI? Is that correct? It sounds too much.

I wonder what 95% or higher H2O2 would yield haha

Lol i was theorizing what the recipie was then I searched it, I love the internet.

Hey, where can i get hydrogen peroxide in germany? (i saw you're german too, so do you know where i can get it without directly writing to a company?)

This man's accent is thicc. But still good

You discovered devil’s toothpaste recipe

keep your hydrogen peroxide solution in room temperature with a large surface area and place a fan above to catalyze evaporation process of water; removing water used to dilute the hydrogen peroxide will increase the concentration. shits too expensive and not worth it tbh