Purifing / Cleaning 2C-B Hbr

[fly-]

The last batch of 2C-B has a off-brown (or semi-red) a slight tan which looks suspicious (for impurities), and the other batch from same supplier was white. Tested 100% 2C-B. I would prefer do some cleaning or purification if possible for further research. Any ideias how can to do it?

Thanks for any info!

 

[sekio]

This is not "advanced". The impurity is probably bromine! You could re-crystallize or shake it ewith decolourising carbon or both.

I would just leave it as is and have fun

-> PD

 

[Solipsis]

Lol are you advising activated carbon for every purification now sekio? Elementary bromine is surely not taken up by it? Maybe it often works for decolorization because pigments may tend to be more complex organic molecules.

I think do an acid/base extraction but at the start of the procedure when dissolving your 2C-B in demineralized water, add sodium thiosulfate. Recrystallization is an option as always, I'll give you that.

Actually if the extraction is not an option for you, you could just make a solution with the thiosulfate and just leave it like that. The reaction should still make the bromine harmless the following way:
2 S2O3(2-) + Br2 --> S4O6 + Br(-)

Br2 is bromine and it's not very good for you although as sekio points to, in very small quantities it can be acceptable. It's a brwown liquid so if you have a powder product that is tan, the amount of liquid bromine in it would be very very small indeed.
Br(-( is bromide and it's harmless, if you have 2C-B HBr then actually you are ingesting Br(-).

 

[kingme]

can it be possible to see an image of this color? so that other may compare it to their own?

ive got a sample that is white with a pink hue to it (but i wouldnt ever call it brown)... unfortunately i have no idea if it is the hcl or hbr, nor do i have nay other 2cb sample to compare it to.

and Solipsis, when you say Br2 in small quantities is acceptable... you mean in regular 2CB doses it is not harmful, correct? If not, any actions that can be undertaken to minimize the damage (such as, perhaps, not insufflating it, to avoit mucosa burns)? bromide is toxic in prolongued use, and in the ~g doses right? (so these impurities, even at normal 2cb doses, would have to be really small, and the toxicity accumulated over very prolongued and continued use if im not mistaken)

sorry if these sound like noob questions, my chemistry aint what it used to be (if it ever was something, which i doubt)

 

[shishigami]

Couldn't you just wash it with DCM or something of that sort? The bromine would go into solution but I very much doubt the 2C-B salt would.

 

[sekio]

Activated carbon is wonderful stuff for scavending trace pigments and tars and stuff, which I'm sure would be the other source of colour aside from bromine.

 

[Solipsis]

can it be possible to see an image of this color? so that other may compare it to their own?

ive got a sample that is white with a pink hue to it (but i wouldnt ever call it brown)... unfortunately i have no idea if it is the hcl or hbr, nor do i have nay other 2cb sample to compare it to.

For the color it doesn't really matter what salt it is. Both should be white when pure, and I'd say that the reason some 2C-B (but rarely other 2Cs!) has a pinkish tan to almost pastel purple-brown color is from the bromine so I'd forget about "pigments" (where would they come from) or tars.

and Solipsis, when you say Br2 in small quantities is acceptable... you mean in regular 2CB doses it is not harmful, correct? If not, any actions that can be undertaken to minimize the damage (such as, perhaps, not insufflating it, to avoit mucosa burns)? bromide is toxic in prolongued use, and in the ~g doses right? (so these impurities, even at normal 2cb doses, would have to be really small, and the toxicity accumulated over very prolongued and continued use if im not mistaken)

sorry if these sound like noob questions, my chemistry aint what it used to be (if it ever was something, which i doubt)

Yes that's what I meant. If you are a consumer of huge amounts of 2C-B, like 4 times a week trying to trip absolute balls combating ridiculous tolerance then yeah I'd really consider cleaning up your 2C-B to protect your health. But if your product has only a pink tinge and nothing more and you use it in a reasonable way then yes it is still certainly smart - why not do it if you have the materials lying around - but if it is a big issue for you to get materials like solvents or thiosulfate or whatever then I'd probably not panic too much and be more or less okay with taking it.

The really pastel purple-brown 2C-B I had, pinkish indeed but it also reminded me a bit of MHRB powder and was more heavily colored than most other things I have come across, that was made at home by a FOAF and I was ignorant back then and had no idea what it was supposed to look like. Sure enough it was one of the strongest batches of 2C-B that I ever used though but then again those were my first times.

The idea about DCM sounds fine and easier than the other suggestions yes. I guess in that case chloroform should work as well, you can just look up bromine solubility and just select any NON-polar solvent in the list.
Note that bromine with an N is Br2, the brown liquid, and that bromide with a D is the ionic Br(-) which is of no real concern.