In the next hour or two I'll be uploading all the raw slow motion (nearly 20 minutes worth!) from this video - it is very beautiful and I didn't want to waste it.... Setting it to some nice music... It will be on my extras channel here: ua-cam.com/users/nottinghamscience
We used it A level in solid form. Many years later, when I was teaching at the same school, we received a missive from Herts CC containing a list of all the chemicals we were not allowed to have. 2,4 DNP was on the list. We checked, yes we had them all and and on the orders of the headmaster we kept the chemicals and binned the list. The head was a chemist.
Had the pleasure of being shown around the department at Nottingham by Professor Woodward, and he was genuinely so friendly and his enthusiasm for teaching and chemistry in general was so evident! Makes me somewhat regret not choosing UoN in the end
I like him. He's smart, well-spoken, a bit crusty, and rather odd looking: like half a Martyn. He's also the only other guy in the lab with those sweet side covers for his eyeglasses.
Unfortunately the camera was destroyed by the explosion and we couldn find the memory card in the building's rubble. Though at least we now have a confirmation of the "runaway reaction " risk of the compound when stocked in a dustbin.
An interesting compound and video. It reminded me of a similar compound that is also shock sensitive when dry - picric acid. It still has a number of uses and must be treated with care. It was also found in the back of some school chemistry laboratory cupboards and had to be removed by bomb squads, especially if dried crystals were seen round the cap. I would like to see if a Periodic Video could be made of it. It would draw attention to its dangers as there still may be bottles of it in hidden corners where the uninitiated could have access to it.
In the world of shock sensitive compounds, actual macroscopic shape plays an important role. Larger, more uniform crystal usually means more sensitivity. If a bottle full of solution or slush slowly dries out over several years or even decades, very big crystals can form. As with picric acid, big crystals are scary stuff but it's rarely something you need a bomb squad for. It's just like with small mercury spills or when you find an asbestos mat in the cupboard - lots of companies out there that lobbied for the local laws to become insane for them to make money. No need for that.
Mrdudeman if I remember correctly yes but you have to take into consideration the low quality standards some companies might have used to synthesize it or the imperfect storage of said chemicals by the mining company. Also include stupidity of some of the miners and you have a recipie for disaster
Concentrated picric acid is used in histology to increace the acidity of tissue samples and allow certain negatively charged pigments to bond with internal cell structures. Someone had left a bottle of waste reagents, probably contaminated with metal salts inside a reagent cabinet before going home from work one weekend. That cabinet no longer exists... =p
We NEED more videos with Professor Woodward! Something about talking about having a cup of tea while doing chemistry experiments is just hilarious to me.
"Benzaldehyde has a very nice smell of almonds, but it's slightly toxic... not *super* toxic..." lol sounds like something Wheatley would say in Portal 2
The reagent is usually used to differentiate between carbonyl compounds. The iodoform test, fehlings test, and tollens test are all used to differentiate carbonyl compounds. Wanted to put this because there wasn't a single intelligible comment here. Everyone talking about explosions.
4:07 Is that orange in real life? It looks green to me.. is it maybe just not represented well in this footage? *Edit:* In the slow motion @ 5:28, it _does_ look orange, guess it's just the camera...
I could watch these chemistry videos with reactions and experiments all day. sadly youtube has a lack of these and I exhausted the supply several months back and video producers make new ones too slow ;)
And again a great video of you guys!! I´m in my 3rd Semester in Chemistry and I totally enjoy watching your videos while eating or smth.. I just feel like I was productive for my studies, while just casually browsing UA-cam. Allthough, having more videos on organic compounds would be very interesting, as those also play an extremly huge role in modern society, health care, etc. Surely Prof. Poliakoff isn´t an organic chemist, but the other chemists, like Prof. Woodward in that one, or Dr. Stockman and Dr. Tang in the video on caffeine also do a great job. So keep on goingand thanks for your work and perhaps show us some more on organic compounds. :D
Hey! (: i love that there is again a video about a chemical and how it was used/ is used. Videos like this are the reason this channel was awesome in the first place (: keep these videos comming! Thank you very much for the entertainment! (:
Chemistry is not so much about properties of the elements themselves, but rather on their behavior in combination with other elements in molecules and reactions/transformations of those.
chemistry is the "study" of matter and it's interactions, you don't need to react chemicals to do "actual chemistry," if you do as little as measure it's mass and volume, you've done actual chemistry
we used this in analytical chemistry to identify unknown compounds, and I was doing research for the paper, so happy that I can watch this and not read some boring pager.
DNPH is still used for HPLC-UV Determination of Ketones and Aldehydes (There's an ISO norm for that). I remember the handbook of chemistry, where you had huge tables with ketones/aldehydes and their boiling point and their DNPH derivative melting for identification of unknowns. Also benzoylchloride derivatives for alcohols etc. Easy ways to identify pure unknowns. But today we have NMR for this and GC-MS and LC-MS for that and identification of unknows in mixtures. In the past they had to isolate the compounds before identifying them with a derivatives melting point.
Hey, thank you for the video! Could you tell me what the painting at about 0:40 (the coloured one) is called and who painted it? I really like it! Greetings.
Zeppelin Conquistador I suspect Neil dislikes the sound of his recorded voice, but if it's just an interview with Neil he doesn't need to watch the resulting video because he'll already know all that is said in it.
No, he can't talk. It is known that he once spat out the senctence "I am gonne throw this into the bunsen burner." But that is highly speculative. Some say, the whole lab had to be evacuated because of sulphuric fumes after he spoke.
Been hearing the name 2,4-DNP in my organic chemistry class for over a year now without knowing what it is and today after watching this video is when I realize what it actually does
Probably unrelated to this video, but I've been vaping to rid myself of a smoking habit, and I'd love to see Periodic Videos do a video on the chemistry of Lithium-Ion Batteries, as an educational primer in the safety of said batteries. Also a chemists version of why venting/thermal runaway happens, and how to prevent it would be amazing!
Add neil.. Clearly you can see that the lack of neil was the reason why the compound did not react. btw please explain MOL thx. Excellent effort btw, and a super stand-in for the professor!! Excellent explanation in all!
i knew phenyl hydrazine i jhust thought maybe he nitrated it^^ you know he likes using stuff he made reviously. but as it´s neither a drug and nobody noticed it stinks why would he make it^^
And what about auto-catalytic decomposition? I mean the substance was tested for shock sensitivity. But what about just heating it and see this auto-catalytic reaction?
I have a question Make some tiny alluminiun foil strips and mik them with a drop of liquid gallium until you have some silvery paste if you put it in water it wil produce hydrogen but what will happen if you put it in different sodas ( coca cola 7up and maybe orange juice ) i'am pretty curios Sorry for my bad english
You may want to look at the conditions in a container when transporting and on a shelf. What if the container was on a rickety chemistry department cart? Inside the container will have some aerated reagent mixed with air. Can you test this against your control in the hood? That is where I would investigate if I had a high speed camera.
I have a video suggestion. I live in Swansea, Wales and in a small town called Clydach where, German-born Chemist, and Inventor of the Nickel Carbonyl Process erected a Purification Factory. I was told that Nickel Carbonyl is very toxic and very volatile. Could you do a video on this?
I honestly thought it wouldn't happen. just because something like an alkaseltzer tab fizzes doesn't mean it will blow up if put in there faster or something.
I don't get it. Why didn't he do a comprehensive test? It doesn't make any sense that he shows that the compound isn't shock sensitive, while at the same time he concludes that one should be careful...
i am a 14 year old who loves science, what university is this because i heard nottingham mentioned in one video and that just happens to be where i live
ah yes here we go, the guy who has watched every video on youtube who knows more than the people who actually went to school for this topic, because orange is a mixture of red/yellow, more diluted will look more yellow, less diluted will look more red. i know this is difficult to understand..
5:28 has to be the sexiest slow motion video I've ever seen.
In the next hour or two I'll be uploading all the raw slow motion (nearly 20 minutes worth!) from this video - it is very beautiful and I didn't want to waste it.... Setting it to some nice music...
It will be on my extras channel here: ua-cam.com/users/nottinghamscience
D.Litt Brady Haran knows his profession.
Ohhh can't wait!
Here it is: ua-cam.com/video/xh93CgBrNDE/v-deo.html
absolute ledgend you are!
5:00 In case you're wondering: yes, "a reasonable amount" is an official SI unit.
Mohamed Haythem Limam Catalysts right?
Penny Lane for catalysts it sounds... reasonable
It's equal to about 0.1 Buttloads or 0.001 Shedloads.
It's exactly 10 SI smidgens.
I thought it was 3.14 smidgeons per dash?
We used it A level in solid form.
Many years later, when I was teaching at the same school, we received a missive from Herts CC containing a list of all the chemicals we were not allowed to have. 2,4 DNP was on the list. We checked, yes we had them all and and on the orders of the headmaster we kept the chemicals and binned the list. The head was a chemist.
Maybe they were telling you you're not allowed to have 2,4-dinitrophenol, the potentially fatal weight loss additive lol.
"Benzaldehyde has a very nice smell of almonds, but it's also slightly toxic."
The best of both.
Vanillin is a similar but much better compound. I have some in my lab, just to sniff it from time to time, lol!
Yaldabaoth Chemplayer seemingly tries to substitute vanillin for benzaldehyde in every possible reaction.
Just slightly lol.
Famous last words ;-)
*BAM BAM BAM*
“This compound is not excessively shock sensitive”
This is gold
Had the pleasure of being shown around the department at Nottingham by Professor Woodward, and he was genuinely so friendly and his enthusiasm for teaching and chemistry in general was so evident! Makes me somewhat regret not choosing UoN in the end
Make more videos with this guy! I really like his style.
I like him. He's smart, well-spoken, a bit crusty, and rather odd looking: like half a Martyn. He's also the only other guy in the lab with those sweet side covers for his eyeglasses.
I expected at least a little explosion.. This video is classic Parker square .
Intellllect agreed. Should one conclude that there are some similarities between a Parker Square and Brady's Reagent?
Was that just a very small reaction during the second hammering?
Intellllect Parker expectations
Try doing this with TATP 😎
When I saw the title I thought the "Brady" it was referring to was Periodic Videos' Brady.
Me too
Next Video: 14 lbs sledgehammer vs dustbin of this stuff
Unfortunately the camera was destroyed by the explosion and we couldn find the memory card in the building's rubble. Though at least we now have a confirmation of the "runaway reaction " risk of the compound when stocked in a dustbin.
@@solstice2318 hehehe
Is anyone surprised that Niel rides a motorcycle?
He's the Chuck Norris of chemistry.
nettles89 Stig. The Stig of chemistry.
Stig's a car guy.
Jonah Holmes and niel is a chemistry guy. the analogy holds
in the liquid nitrogen video neil can be seen wearing some very nice leather pants
I really like Prof Simon! A consummate pro but not shy of making the chemistry approachable, and also very entertaining.
An interesting compound and video.
It reminded me of a similar compound that is also shock sensitive when dry - picric acid. It still has a number of uses and must be treated with care.
It was also found in the back of some school chemistry laboratory cupboards and had to be removed by bomb squads, especially if dried crystals were seen round the cap.
I would like to see if a Periodic Video could be made of it. It would draw attention to its dangers as there still may be bottles of it in hidden corners where the uninitiated could have access to it.
Martyn Poliakoff looks very different this episode. very interesting!
It is all Neil. He has quantummechanical properties.
Because Martyn Poliakoff does not appear in this episode!
@@aparnavellala624 r/wooooosh
@@aparnavellala624 r/whoosh
8:40 _"You better not damage these..."_ - Neil
I'm sure he said "stay out of my territory!"
The36th
He's bidding his farewells.
The36th what are you doing with my gloves?
Okay, sorry. I'm taking them off, don't hurt me.
In the world of shock sensitive compounds, actual macroscopic shape plays an important role. Larger, more uniform crystal usually means more sensitivity. If a bottle full of solution or slush slowly dries out over several years or even decades, very big crystals can form.
As with picric acid, big crystals are scary stuff but it's rarely something you need a bomb squad for. It's just like with small mercury spills or when you find an asbestos mat in the cupboard - lots of companies out there that lobbied for the local laws to become insane for them to make money. No need for that.
Finally Brady's reagent featured on a Brady Haran video
"This compound is not excessively shock-sensitive." Science! :D
Penny Lane excess is subjective. My heart goes out to all the miners that had to use picric acid for clearing rocks.
The Gayest Person on UA-cam Isn't picric acid only shock sensitive when in contact with certain metals, and it forms very sensative picrates?
Mrdudeman if I remember correctly yes but you have to take into consideration the low quality standards some companies might have used to synthesize it or the imperfect storage of said chemicals by the mining company. Also include stupidity of some of the miners and you have a recipie for disaster
Concentrated picric acid is used in histology to increace the acidity of tissue samples and allow certain negatively charged pigments to bond with internal cell structures.
Someone had left a bottle of waste reagents, probably contaminated with metal salts inside a reagent cabinet before going home from work one weekend.
That cabinet no longer exists... =p
I was totally expecting Brady to be a part of this somehow
We NEED more videos with Professor Woodward!
Something about talking about having a cup of tea while doing chemistry experiments is just hilarious to me.
Interesting and educational - at least to me. Need more of these kinds of videos that really teach! MORE MORE MORE
I love Neil's poker face. Is he so intense whit friends or is he just a great professional who knows chemistry is a serious business?
This is great.
It's like being back in my chemistry class listening to a lecture. :D
"Benzaldehyde has a very nice smell of almonds, but it's slightly toxic... not *super* toxic..." lol sounds like something Wheatley would say in Portal 2
This experimenter is great and sounds very experienced. Someone worthy of Christmas Lectures!
The reagent is usually used to differentiate between carbonyl compounds. The iodoform test, fehlings test, and tollens test are all used to differentiate carbonyl compounds. Wanted to put this because there wasn't a single intelligible comment here. Everyone talking about explosions.
4:07 Is that orange in real life? It looks green to me.. is it maybe just not represented well in this footage?
*Edit:* In the slow motion @ 5:28, it _does_ look orange, guess it's just the camera...
Excellent video. Personality on par. You guys get to have a lot of fun.
I could watch these chemistry videos with reactions and experiments all day. sadly youtube has a lack of these and I exhausted the supply several months back and video producers make new ones too slow ;)
And again a great video of you guys!!
I´m in my 3rd Semester in Chemistry and I totally enjoy watching your videos while eating or smth..
I just feel like I was productive for my studies, while just casually browsing UA-cam.
Allthough, having more videos on organic compounds would be very interesting, as those also play an extremly huge role in modern society, health care, etc.
Surely Prof. Poliakoff isn´t an organic chemist, but the other chemists, like Prof. Woodward in that one, or Dr. Stockman and Dr. Tang in the video on caffeine also do a great job.
So keep on goingand thanks for your work and perhaps show us some more on organic compounds. :D
Hey! (: i love that there is again a video about a chemical and how it was used/ is used. Videos like this are the reason this channel was awesome in the first place (:
keep these videos comming!
Thank you very much for the entertainment! (:
I really like this mans presentation style
I like this guy. Clear and concise and explains every step. Fantastic
What a pleasant surprise, some actual chemistry on periodic videos!
Dude, they did a video for every element on the Periodic Table - I don't know how you could do any more for the sake of Chemistry on UA-cam...
Chemistry is not so much about properties of the elements themselves, but rather on their behavior in combination with other elements in molecules and reactions/transformations of those.
They have done hundreds of videos like that.
chemistry is the "study" of matter and it's interactions, you don't need to react chemicals to do "actual chemistry," if you do as little as measure it's mass and volume, you've done actual chemistry
we used this in analytical chemistry to identify unknown compounds, and I was doing research for the paper, so happy that I can watch this and not read some boring pager.
A good follow up classification test to the Brady’s reagent would be the Tollen’s Test. I think that would be another interesting video
I like the depth of chemistry touched on in this video.
was half expecting them to cut to footage of a mushroom cloud or do a jojo's bizarre adventure to be continued right before the hammer strike
Good video
DNPH is still used for HPLC-UV Determination of Ketones and Aldehydes (There's an ISO norm for that). I remember the handbook of chemistry, where you had huge tables with ketones/aldehydes and their boiling point and their DNPH derivative melting for identification of unknowns. Also benzoylchloride derivatives for alcohols etc.
Easy ways to identify pure unknowns. But today we have NMR for this and GC-MS and LC-MS for that and identification of unknows in mixtures. In the past they had to isolate the compounds before identifying them with a derivatives melting point.
Neil makes every video better, even when he's not directly in them.
OH SNAP! HE'S ACTUALLY IN IT! EVEN BETTER!
Hey, thank you for the video! Could you tell me what the painting at about 0:40 (the coloured one) is called and who painted it? I really like it! Greetings.
for 1mil can neil do a QnA
I´m happy to look at him with his mouth closed as well, but a Q&A would be awesome.
And the whole while it'd be him looking unblinkingly at the camera and occasionally laughing evilly at the audience's questions.
Zeppelin Conquistador I suspect Neil dislikes the sound of his recorded voice, but if it's just an interview with Neil he doesn't need to watch the resulting video because he'll already know all that is said in it.
No, he can't talk. It is known that he once spat out the senctence "I am gonne throw this into the bunsen burner." But that is highly speculative. Some say, the whole lab had to be evacuated because of sulphuric fumes after he spoke.
Yes, and the answers for all questions will be a silent, quite severe stare.
yay, an upload+!
Yay! Finally! I was hoping for that video to happen!
this chemist is great to listen to! a little more advanced terminology, yet fascinating anyway for laymen (me and probably 90,000 other subs)
Been hearing the name 2,4-DNP in my organic chemistry class for over a year now without knowing what it is and today after watching this video is when I realize what it actually does
Very well spoken, both clear and articulate
I like this guy a lot, hope hes in more of the new videos.
Used to make up gallons of the stuff ( well litres) as the Hydrochloride for the organic chemistry module at the local Poly back in the day.
was just studying about this very substance ... such a right timing u have!!!
Oh man, the CC is remarkable. How shock sensitive are "ladies regions" when wet?...
@ 4:09 The solution appeared to be green on the video. Why was this the case?
The mastering of the physical universe by humans, especially chemistry, is truly remarkable!
i don't know how almonds smell like in england, but benzaldehyde smells more like what bitter almonds taste like
4:03 ''it should come out as a bright orange solution'' - fcking green. lol.
Probably unrelated to this video, but I've been vaping to rid myself of a smoking habit, and I'd love to see Periodic Videos do a video on the chemistry of Lithium-Ion Batteries, as an educational primer in the safety of said batteries. Also a chemists version of why venting/thermal runaway happens, and how to prevent it would be amazing!
at 6:00 the name of the product is wrong.....its Benzaldehyde 2,4 - dinitrophenyl hydrazone
The overstated reputation for explosion demonstrated in this video reminds me of an old Cody's lab video about adding water to concentrated acid.
I'm wondering if humidity has a factor. Some schools have HVAC systems that produce relatively humid air while others relatively dry air.
DNP is usually used to denote the thermogenic 2,4-Dinitrophenol, probably better to use DNPH for the phenylhydrazine.
Add neil.. Clearly you can see that the lack of neil was the reason why the compound did not react. btw please explain MOL thx. Excellent effort btw, and a super stand-in for the professor!! Excellent explanation in all!
9:11 This could be right out of Look Around You
I'm sure that was unintended
"This compound is not excessively shock sensitive... write that down in your copybook now"
I've used 2,4-DNPH (in solution) at school as part of my A-level, it's completely safe when wet.
"Completely safe when wet." ;)
"safe" is a relative term.
Exactly. We use it a lot in organic analysis
9:40 Aaaaa yes now i will move my 14lb slegehammer away from my dustbin of 2,4-Dinitrophenylhydrazine thank you for the tip
No Explosions? Can you make a vid about silver fulminate? Plz?
You guys know NileRed?
did Nile make it? moust have missed it. (i think he has one of the best YT-chemistry channels)
Metalhammer1993 I don't think he has, but he has certainly made the related phenylhydrazine which is sometimes used for the same purpose.
I don't think he made a video on this. He made videos on phenylhydrazine, which can be a precursor of this chemical, and on benzaldehyde.
i knew phenyl hydrazine i jhust thought maybe he nitrated it^^ you know he likes using stuff he made reviously. but as it´s neither a drug and nobody noticed it stinks why would he make it^^
SeriousGamingDE yea. Nile Red is probably one of my favorite channels.
This should've been the very first video of Periodic Videos
Random question: do you have a make/model for the air "gun" hanging off the fume hood door in this (and other) videos?
Very nice video! Perhaps it is interesting to explain the term "stoichiometric".
You should have used the Small Metallic Collider.
And what about auto-catalytic decomposition? I mean the substance was tested for shock sensitivity. But what about just heating it and see this auto-catalytic reaction?
I have a question
Make some tiny alluminiun foil strips and mik them with a drop of liquid gallium until you have some silvery paste if you put it in water it wil produce hydrogen but what will happen if you put it in different sodas ( coca cola 7up and maybe orange juice ) i'am pretty curios
Sorry for my bad english
the ending just... ahhh, had a tear. so funny
I like this guy. I hope we'll see him again.
I wonder how alike this compound is to 2,4-DNP, the pharma drug used (misused) for rapid weight loss?
Why do things that smell or taste of almonds kill you?
3:05 the most elegant way of explaining an explosion
Hi Brady I have a question. What happened of the Sixty Symbols Ogden Fellowship ?
You may want to look at the conditions in a container when transporting and on a shelf. What if the container was on a rickety chemistry department cart? Inside the container will have some aerated reagent mixed with air.
Can you test this against your control in the hood?
That is where I would investigate if I had a high speed camera.
I have a video suggestion.
I live in Swansea, Wales and in a small town called Clydach where, German-born Chemist, and Inventor of the Nickel Carbonyl Process erected a Purification Factory. I was told that Nickel Carbonyl is very toxic and very volatile. Could you do a video on this?
Thanks for use of the gloves, Neil!
no discussion on dnp's effects on the bodies atp production?
I honestly thought it wouldn't happen. just because something like an alkaseltzer tab fizzes doesn't mean it will blow up if put in there faster or something.
So wheres the Professor? I've not seen him anymore here.
I don't get it. Why didn't he do a comprehensive test? It doesn't make any sense that he shows that the compound isn't shock sensitive, while at the same time he concludes that one should be careful...
i am a 14 year old who loves science, what university is this because i heard nottingham mentioned in one video and that just happens to be where i live
Cole Foster Yes it's the university of Nottingham
That apparatus is the hammer of knowledge.
benzaldehyde and cinnamaldehyde are my 2 favorite compounds for obvious reasons
You guys should do a video on Perchloric Acid, if you can. I know its incredibly dangerous so its very fascinating. Keep making great videos!!
I would think the bisulfite adduct would be a safer alternative to the hydrazone.
So there must be some precedent for why this compound is thought to be explosive. Anyone know why?
how is liquid air obtained and what are the gases evolved from it
"Take a Sledge Hammer and Dustbin full of this staff " Most Satire Quotes Ever!!!!!!
I'm still waiting for the explosion.
"that's where all the fun and games start" remark of the day for me ^_^
3:10 who said science wasn't sexy ^_^ just listen to that sexy way of saying explosion rawrrr ^_^ hahahahaha
very nicely presented
What it is NaK? Sodium and Kalium? I see at my screen.
4:04 That's the yellowest orange I've ever seen...
For us in organic chemistry, red, orange and yellow are the same color. It's just a matter of dilution.
Yaldabaoth _red, orange and yellow are the same color_
That's... so obviously *wrong* as to boggle the mind.
RonJohn63 "matter of dilution". get some yellow food colouring, and slowly add water
ah yes here we go, the guy who has watched every video on youtube who knows more than the people who actually went to school for this topic, because orange is a mixture of red/yellow, more diluted will look more yellow, less diluted will look more red. i know this is difficult to understand..
404 ERROR
ORANGE NOT FOUND
how to do hydrolysis of ester using two concentration and velocity constant of reaction