Making a Beautiful Violet Dye

In this video I make the beautiful purple dye Azo Violet. This is done by an azo coupling of p-nitroaniline and resorcinol, and is one of the final products in a long project I've been working on that began with the conversion of p-aminobenzoic acid to aniline.
The other final products of this project are para red, and possibly paracetamol (tylenol) if there is enough interest.
As always, do not attempt anything you see except under professional guidance.

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[mapple]

please go more into dyes. i think most pharmacists and chemists overlook the dye industries effect on modern medicine and chemistry. Most giant companies they do chemistry got their start either making dyes or explosives.

[-r-]

azo dyes were synthesised in a reactor with a circulation line via a spectrometer.
this relatively simple and yet expensive method ensured that a specific colour could be achieved and then the next operation was triggered. I remember the huge nutsche dryers used in one plant vividly.

thank you very much for sharing your experiments with dyes as they were the reason why we one day found out byproducts had pharmacological properties and from there we have come very far.

[yorkshirechemist]

very nice work!
regarding its intensity in solution, that's true of azo dyes in general - many FD&C dyes are azo compounds, and only a few parts per million are required to achieve the desired colour

[lordshaxx]

Sweet! Now I can paint my Slaneesh tabletop army

[aqua-op]

Nice video as usual. Needed this tonight, a lot.

[Samonie]

great video, love these kinds of organic chemistry video's

[DangerousLab]

"Ar = Aromatic ring", this is so classic! I thought it was Argon when I first learned organic chemistry.
"Wait Argon can form bonds!?"🤣

[flyingshards]

Very nice! Using potassium instead of sodium nitrite is interesting and accessible from an amateur perspective!

[_Higgs]

This channel reminds me of old school Nile red. (Meant in a good way)

[NyxWhiteFang]

The precipitation is probably due to Mg2+ precipitating as Mg(OH)2, and the red color in alkaline tap water could be from the Azo violet Mg2+ complex (blue) and the normal alkaline Azo violet... maybe. Color theory is not my forte

Edit: on second thought, the Mg2+ complex should turn it darker blue. Maybe it's another metal complex like calcium?

[windsurfingphd]

Can you use the red powder at 5:26 as a pigment to replace Pyrrol Red? Also, I want to ask if you can use these dyes in Na2SO4-based lakes to make pigments. Thank you for showing us these useful videos. BTW, where do you get organic chemicals?

[rickdeckard]

I wish I knew and understood chemistry.

[SetTheCurve]

Pretty sure your explanation about the ortho para direction hindrance is incorrect. Ortho to either hydroxyl group is para to the other. And either location is identical.

[derchromebacher]

That's the sh1t I'm here for 😌

[ImPrather]

Quick question. What would happen if you put potassium or lithium or sodium in hydrogen peroxide

[mbcorp]

so beautiful!
are you planning to make pigments anymore?

[petevenuti]

What dyes would you recommend as photosensitizers?

[rickrolls]

It’s more like Azo Red than Azo violet