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How much IPA per 1g of flour do you suggest?

Yes. But when such coloured powder is dissolved in various combinations of water and acetone, a butter or such oatmeal comes out, which becomes coloured again during filtration.

Once I have several kilos of dirty flour, how do I try to get rid of this methylamine?

Currently, the last thing I can think of is to dissolve 1g of dirty 4MMC in 1ml of hot water. Let's assume that we then have 500ml of such a solution. So we then add 250ml of DCM, stir vigorously after which the aqueous layer once separated goes to crystallise. I guess the last hope in this

I can't do anything about it anymore?

So there is nothing more I can do about it I understand, or does anyone else have any ideas?

I know how it should look. 4CMC

3h at 60 degrees gives the best result. But not about that. At 60 degrees Toluene does not boil, while DCM at 40 does, hence it evaporates quickly and a reflux cooler is needed. Isn't it?

He is aware of this. Everyone recommends DCM. Unfortunately there, at 40 degrees C and a 2h response, it is necessary to use a reflux cooler, which with my volumes and workspace is not an option.

Having a pure 4MMC base in Toluene, can I add an equal volume of ethyl acetate and desalt with hydrochloric acid to PH 5.5 without any problem? I have recently started doing this as I have ethyl acetate much cheaper than Acetone. Will this negatively affect the yield or quality of the product?

What the problem was is no longer important. I have a lot of coloured 4MMC powder and I can't crystallise it because of this. I am therefore looking for a way to get rid of the impurities. Is dissolving such coloured 4MMC hydrochloride in hot DCM, successively add an equal volume of water...

No crystal wants to grow out of such highly coloured powder

I already have mephedrone salt, but it is blue-red and even huge amounts of acetone refuse to flush the colour to pure white.

I am very curious about this synthesis, in a few days I will have the opportunity to test it, so I have a few questions: 1. in step 2, point 10 instead of Acetone can I use IPA? When I use HCL 35-37% aq in combination with Acetone there is always a lot of colour, 1.4-Dioxane helped but is very...

I have a couple of fundamental questions: 1. we don't heat the whole thing to 40 degrees before adding the m40, and we add all the m40 at once? 2. there is no need to watch the temperature when adding m40? 3. can I use HCL + IPA for acidification instead of hcl + acetone? Want to get rid of...

Hello, can I carry out acidification in a container made of stainless steel AISI 304? Steel, as we know, is defenseless against hydrochloric acid, but when acidizing with even concentrated hydrochloric acid in water, its % content relative to the total volume of the liquid will be negligible...

Anyone have anything?

Can you describe how you manage to do this and with what efficiency? Even on pw if it is a problem so that a wider audience can see it. Interesting topic let me tell you 😀

I would forget. I always acidify to pH 7, is there any point in going lower and if so to how many?

Hi. How many litres of solvent in the form of Benzene / Toluene is it best to use for 1kg of BK4? The reaction would be carried out at 60 degrees. How long should the reaction take at 60 degrees, 2.5 or 3h? Should the time needed to heat the mixture to 60 degrees be counted as half or not...