n-Heptane can be heated to 98 °C and therefore above DMTs melting point. That's why it can also potentially hold infinite DMT at boiling temp. For n-Pentan it's not possible (already boiling at 36 °C so the maximum will be quite low. For recrystallization just go with whatever Hexane/Heptane/Naphtha is the cheapest to get. But always make sure to get a Naphtha that is a mix from Hexan/Heptan isomers.

There are at least 3 reported crystal structure modifications of DMT, coming in different crystal grids and thus different melting points. I just know the one that precipitates already at room temperature more yellow and the one that precipitates at lower temperatures fully white. Hence I believe the later one might be more crystaline as it takes longer and slower precipitation, so the melting point might also be higher.

No absorption in visible range (400+ nm), so it is white ... But what you can see here nicely is that it just got that typical tryptophane peak at 280 nm - this peak is normally used for protein UV-detection.

Here is the thermogravimetric analysis of DMT. Heating rate is 3 K / min. What you can see here is the mass loss of a sample while heating. Thats very nicely demonstrating any evaporation effects. So what you see here: First Vaporization starts at 145 °C (even though I can see trace vapors coming from DMT at 100 °C) and ends at 232 °C. I guess the formerly proposed vaporization range of 165 - 180 °C still seems to be the best choice.

Here is the differential scanning calorimetry analysis of DMT. Heating rate is 3 K / min. What you can see here is the uptake or release of Enthalpy of the sample while heating. Thats very nicely demonstrating any phase transition effects like crystalization / melting. A rising graph indicates an endothermic process, which consumes energy and a decreasing graph vice-versa. So what you see here: There is a melting point onset of DMT at 63 °C. No further melting points detected, so we dont have any polymorphism in this sample. There is another endothermic effect between 200 °C and 245 °C. No idea what that is, but maybe some sort of thermal degradation? Still I think that should only happen > 250 °C ... anyways as the TGA suggest vaporizing your DMT at < 200 °C, this once again shows that for efficient / healthy / non-material-wasting evaporatoin the stuff should not be heated > 200 °C.

Not much to say. Dont heat your Spice above 200 °C, this will just cause combustion at some point. Therefore approaches with open flame and Changa will always create unhealthy smoke, that bad charred flavor will just be hidden by the strong DMT-smell. Better use a controlled way of delivering 160 - 200 °C and inhale fresh healthy swiss-alps-DMT.

Also that solubility in the freezer value may now help you to plan your re-x. No more "Maybe you just have to evaporate more Naphtha to get any product? "
Just estimate that ~ 1 mg of Spice will be still held back per 1 ml of Naphtha after freeze-precipitating. This means dont re-x your 100 mg Spice in 100 mg Naphtha Also if you haven't got any precipitation from 100 ml of Naphtha in the freezer, then you still wont get more than 100 mg from that even if you further reduce ... maybe the problem happened earlier then.

That UV/Vis-spectrum is not that interesting, but it shows exactly the Tryptophane-Absorption at 280 nm, which is also used for Protein UV-Detection. Nothing special else though.

If more polymorphs may be accessed with different melting points, these could be measured by XRD and then maybe higher-melting-point-spice will also show greater degrees of crystalinity. It would be senseful if very amorph Spice would be the reason for people observing DMT melting as low as 50 °C and high-crystalinity Spice would be causing 80 °C melting reports. Nevertheless that 58 °C sample looked also quite crystalline ...

Dispense 1 g of DMT in 2,4 ml of 30 % H2O2 (does not dissolve as this is basically water). Add amounts of Ethanol while stirring until all DMT is dissolved. Should be ~ 7 ml Ethanol in total. Stirr this mixture for 48 h at Room Temperature until full conversion. Evaporate all solvent, leaving behind DMT-N-Oxide. (source)

TLC after 48 h still showed a spot in height of starting material. Nevertheless the final product was extracted with boiling Hexane and this Hexane showed no clouds when Trifluoroacetic acid was dropped inside, indicating no residual Freebase so conversion was quantitative.
Also the majority of solvent was evaporated by N2-stream. The last bit was evaporated on a hot plate (Picture 1). This should be done with caution, as it was discovered the N-Oxide is very heat sensitive and decomposes already above 110 °C (Picture 2, turning completely black just within less than 3 seconds). If treaten with care it will form a waxy orange solid (Picture 3).

Solubility:

boiling n-Hexane (69 °C)
insoluble

Aceton (RT)
insoluble

DMF (RT)
insoluble

DMSO (RT)
soluble

Water (RT)
soluble




Phase Transitions:



Measured with IR Thermometer on a hot plate (give it +- 5 %)

Melting Point
40-50 °C
hard to determine due to waxy structure

DMT-N-Oxide turning black
110 °C

First fumes starting
130 °C

No fumes arising anymore, black tar residue
150 °C




IR-Spectrum (measured in attenuated total reflection method (ATR))



DMT-N-Oxide separation:






Comments:

So interestingly DMT-N-Oxide is a solid, but thats also what you can observe with DMT: Just having small traces of impurities it will already start to become oily. Still, the substance is quite waxy. Also interesting, but annoying seems the super fast thermal decomposition, starting from 110 °C and running super fast, finishing in seconds. If just started once you will lose your N-Oxide 100 %. This makes it super unlikely that anyone ever has smoked some real N-Oxide, also it seemingly being non-soluble in Acetone as it seems, preventing it to be transfered further into Changa. People still dissolving all their oily DMT in Acetone probably had no N-Oxide pollution, but just oily DMT due to other impurities.
Actually I even think having any reasonable of the N-Oxide in your extracted stuff is just super unlikely. Why should it have become oxidized? You would need a real oxidation agent or UV-rays and pure heat does not oxidize DMT - even when in direct contact with O2. Also UV-Rays will not make a full conversion. Therefore even if there were traces of N-Oxide in a plant-derived sample, they will always come with a big bunch of non-oxidited DMT. Only a real chemical conversion would lead to 100 % N-Oxide. So based on smoking oily residues labelled as N-Oxide and being called active, this may have just been a false positive thing. I more have the feeling that people in general call oily DMT being polluted by N-Oxide, but also even small amounts of pollutants will turn your goodies to an oil, this sample is a classic oily mess and still 80 % of DMT Purity.

In regard to bioactivity of DMT-N-Oxide I think its nearly impossible to smoke this compound, as it will turn black within less than 3 seconds once heated above 100 °C. By that time it will not even have evaded any fumes to inhale. Further heating does just produce traces rising up from that super uggly and unhealthy looking black tar (see Picture 2). But as the N-Oxide is the natural product of MAO-enzymes, it should not be needed to block these when incorporating the N-Oxide. This means if it HAD any psychedelic effect one could simply eat any amount of N-Oxide and would suspect an effect not too far off from the same amount of DMT, eaten with 150+ mg Harmalas. Now people could argument, eating would be an inefficient ROA, as the high-polarity compound is not likely to tresspass membranes and will have low bioavailability. Actually it is even less polar than DMT when eaten orally: macroscopically the positive charge is decreased due to the additional Oxygen at the protonated N-Oxide. And now DMT is indeed bioavailable when eaten, as people know so the N-Oxide should be too, if it had any activity at all.
The proof can be seen here in this reversed-phase Chromatogram. The solvent protonates any bases, causing them to have uniform charging across the column. This happens to DMT and the N-Oxide, while now being DMT+H(+) more polar than DMT-N-OH(+). In a consequence, the N-Oxide elutes 1 min later in reversed-phase and the solvent can be transferred to our gastric conditions, where also both compounds will form their protonated salts. This way I am very certain, that if N-Oxide HAD an effect it will be visible upon oral ingestion.

80 mg of DMT-N-Oxide was eaten. No effect
But: It tastes like DMT (Ginger-like spicy) + an additional Cherry Flavor. Super cool! Weird sweet bonus, exactly like Cherry Menthol gums.

So while the N-Oxide being a metabolist of DMT and definetly has a metabolic pathway in the body, I highly doubt it would still interact with the same receptors that are also responsible for DMT-effects. That unoxidized Amine would normally be important for in-vivo recognition at receptors, rendering it possibly inactive upon oxidation, as the N-Oxide is a very different chemical species - unlikely to show the same binding behaviour. That said and given the facts that it cant really evaporated and shows no effect upon ingestion, I highly doubt that anybody ever was high on N-Oxide .

Phase Transitions:



Measured with IR Thermometer on a hot plate (give it +- 5 %)

Melting Point
/

First fumes starting
130 °C

Strong fumes from
165 °C+

No fumes arising anymore
190 °C

I think 175 °C is optimal for vaporization.


IR-Spectrum (measured in attenuated total reflection method (ATR))




Water-Uptake

It was reported only -Fumarate/-Maleate/-Benzoate salts are the common variants that are not hygroscopic (maybe Ascorbate too?). I'm not sure whether DMT-Acetate really is also hygroscopic, it may just already be an oil in general - it seems to me - even though thats anti-intuitive, being a salt itself.
Still this could be verified very easily by NMR. Water appears in 1H-NMR at 4,67 ppm.

Example: if 1H-NMR shows an Integral of 2,75 at 4,67 ppm (s), then the water content in DMT-Acetate is 10 %. But well thats just a random example and not measured. I would have access for measurement, but I dont feel quite well to do that right now ...

In theory water could also at least qualitatively identified in that IR-spectrum. There should be a big peak at ~ 1600 cm^-1, but that could also be from acetic acid. So not really sure, but I also dont really have a Clue about IR.

Caution: In contrast to DMT Fumarate it also has a high solubility in organic solvents. In general already mediocre at room temperature, but excess Ethanol / IPA will quickly dissolve it. It can be even dissolved in boiling Aceton / Ethyl Acetate. Therefore take care when playing around with this salt - you might actually loose some otherwise. Therefore you would need a much higher concentration of DMT / Benzoic Acid than when creating the Fumarate-salt instead. Much better than the previously mentioned solvents is Toluene, which also requires freezing to get most DMT Benzoate out as a precipitate. According to Loveall also Limonene has a really low solubility at room temperature so Limonene is probably the best solvent to create DMT Benzoate, as no freezing is required and the solvent is not toxic like Toluene. Still for a purification by recrystallization Toluene might still be better, but solubility of DMT Benzoate in boiling Limonene was not checked and maybe is also high enough.

To precipitate DMT-Benzoate, use freezer-cold Toluene or Limonene. Better not use Naphtha for DMT only, as it risks Benzoic Acid precipitating instantly before forming the salt. When using Ethyl Acetate the solution should be concentrated to 1 g / ml first, as otherwise solubility is already too high.

Phase Transitions:



Melting point measured with DSC (Heating rate = 3 K / min). Picture is not included to safe space.

Check DSC

Melting point peak onset = 163 °C
Melting point peak max = 166 °C

Based on TGA-DSC-comparison there is not much of a liquid range. The salt directly evaporates after melting. Probably because of the now increased mobility of ions the process is enabled, that let's those molecules vaporize.


Thermogravimetric Analysis (TGA) (Heating rate = 3 K / min)

Check TGA of only DMT-Benzoate






IR-Spectrum + UV-Vis was measured, but not interesting so not uploaded


Comments:

To me now a question is: Why are these DMT salts evaporating so easily. At least Acetate and Benzoate show nearly no difference to the Freebase. Of course the +30 °C is not small, but it does not matter for practical efforts and I would have assumed like +200 °C.

So far the canon was Salts can't be smoked and indeed the Sulfate is just burned to death. But any practical efforts that have been done on this would have probably been with the Fumarate. I dont have any to test. So it would be an interesting thing to test the fumarate - in case it would indeed not vaporize and be the reason for initial salt-non-evaporation-beliefs then probably this might be linked to the whole ionic complex consisting of DMT*1/2Fumarate instead of being a simple salt like DMT+ Benzoate-.

Bufotenin is the most polar common Tryptamine, only surpassed by Psilocybin. Therefore it is completely insoluble in Hexane/Naphtha, but can be soluble in pH > 12 water due to Phenol deprotonation. It is hard to crystalize and will mostly give just an oil. The following solutions can give crystalline products:

Selectively dissolves Bufotenin and not the more polar components of A. colubrina seeds. But you will need a defat with Naphtha before. With 2x re-x you should get pretty pure and light-colored Bufotenin (Pictoral). Nevertheless you might evaporate a little more Xylene before placing in the freezer, to retrieve more of your goodies.
Why is Xylene a good solvent, even though its way more unpolar than Bufotenin? 69ron gives explanation (cant find source): Xylene can heat Bufotenin above its melting point, thus forming a liquid-liquid mixture, which is miscible. This can also be used with Limonene, but Limonene is much worse as it needs to be heaten additional 30 °C to 175 °C, which causes partial degradation of Bufotenin.

Not as good as Xylene - you should only use it as an alternative when not being able to get Xylene. Still possible to get crystalline product (Picture). This will still catch up to 2 % of more polar components from the seeds as you can see here in NMR and GC. Also when pulling with this on Anadenanthera colubrina seeds, defat first with Naphtha.

Mentioned for recrystalization in literature. Not recommended, seems to cause a darkening (Picture, right). Also very high solubility overall, means you have to use very minimal amounts of solvent = inconvenient to handle. Furthermore if the Bufotenin has a low purity it will just stay oily after re-x.

Phase Transitions:

Measured with IR Thermometer on a hot plate (give it +- 5 %)

Even though 146 °C is given in literature, both amorph and crystaline Bufotenin gave the following melting point.

Melting Point - DSC (see further down)
132 °C

First fumes starting
160 °C

Bufotenin turning brown (possible phenol -> keton oxidation)
170 °C

Strong fumes from
190 °C+

No fumes arising anymore ...
230 °C

... leaving behind a considerable amount of charred Bufotenin. Seems that it cant be fully evaporated without causing at least partial degradation.

I think 220 °C is optimal for vaporization.




IR-Spectrum (measured in attenuated total reflection method (ATR))




UV-Vis spectrum (0,25 mg/ml in Acetonitril)






Thermogravimetric Analysis (TGA) (Heating rate = 3 K / min)






Differential Scanning Calorimetry (DSC) (Heating rate = 3 K / min)






Comments:

So Bufotenin is hard to crystalize, but easy when using the 2 mentioned solvents. When not heating to 170 °C it seems quite stable and that phenol is not prone to oxidation as people may think. It stays clear white for months even at room temperature. Sadly it does not vaporize cleanly and will degrade by 50 % instead into a black tar. This 5-OH group seems to cause a lot of trouble here not only for crystalization. According to many sources Psilocin (4-OH-DMT) can degrade over the time in mushrooms, as enzymes may partially still work or oxygen also promotes this reaction. It is now shown that this is some kind of polymerization of the indol - read here or here. Although there are no enzymes to convert Bufotenin (5-OH-DMT) it could also polymerize while exhibiting the same Chinon-like structures as Psilocin - only with the restriction to 1 of the 2 possible conjugations, which is an ortho-coupling (instead of para, which is blocked for Bufotenin). Therefore my theory is at > 170 °C Bufotenin turns brown, as it starts - mediated by oxigen - also to polymerize. This reaction creates a pi-conjugated molecule of big size, therefore it will absorb more light and ultimately become black. This also does not vaporize anymore and there you have the residual 50 % Bufotenin as a black tar in your vaporization vessel. Luckily only happens with Bufotenin, as for any other O-substituted Tryptamin (like 5-MeO) the electron density increasing effect is way lower, preventing a reaction like this.

The vapor in low concentrations tastes nicely like toasted nuts. In high concentrations it may feel nauseating. But maybe thats just as the overall effect of Bufotenin is a little bit nauseating. Seems this cant be avoided, as Bufo is quite similar to Serotonin and therefore causing intense vasoconstriction and tingling in the face and fingers. Not too pleasant. Also face turns quite cold. Red coloring at the face could not be observed. Still other people have reported very promising / intense / interesting experiences when vaped.
Oral consumption seems rather ineffective. 100 mg of Bufo-Fumarate just gave a slight effect, comparable to 1 g of Mushrooms possibly, while still being bad to the stomach.

You will need to create Bufotenin Benzoate to smoke it. This will not undergo this combustion reaction and not form harsh vapor. Vasoconstriction is still present to a small degree. See further information here.

boiling Naphtha (80 °C, C6-C7, 60-80 °C)
4,5 g in 100 ml
45,0 g in 1 l

Naphtha (20 °C, C6-C7, 60-80 °C)
104 mg in 100 ml
1,0 g in 1 l

Naphtha in the freezer (-20 °C, C6-C7, 60-80 °C)
70 mg in 100 ml
700 mg in 1 l


boiling n-Hexane (69 °C)
1,9 g in 100 ml
19,0 g in 1 l

n-Hexane (20 °C)
84 mg in 100 ml
840 mg in 1 l

n-Hexane in the freezer (-20 °C)
46 mg in 100 ml
460 mg in 1 l

Compared to 5-AcO-DMT the solubility in Hexan is still more than 4x as high, which still dissolves slightly in Hexan. But upon freezing the Solubility drops basically to 0, in contrast to other Tryptamines and their respective solvent-of-choice. So when doing a recrystalization there is basically no chance to loose material, even when only cooling to RT. Also in the freezer you dont get any more precipitation, so just stay with RT. Regarding crystalization, you can find some thoughts here.

Phase Transitions:

Measured with IR Thermometer on a hot plate (give it +- 5 %)

Melting Point - amorph
47 °C

Melting Point - crystaline
49 °C

Melting Point - DSC (see further down)
62 °C

First fumes starting
118 °C

Strong fumes from
170 °C+

No fumes arising anymore
190 °C

I think 175 °C is optimal for vaporization.




IR-Spectrum (measured in attenuated total reflection method (ATR))




UV-Vis spectrum (Acetonitril, didnt write down concentration)






Thermogravimetric Analysis (TGA) (Heating rate = 3 K / min)






Differential Scanning Calorimetry (DSC) (Heating rate = 3 K / min)






Comments:

So based on these results 5-MeO-DMT and DMT seem like quite close brothers, whereas Bufotenin is more of an oddity.
Regarding phase transition I would have expected at least 50 °C more for vaporization, but we saw that even Harmalas can vaporize at 200 °C.
Seems like an electronic device to be used for the whole spectrum of the Nexians' favorite molecules doesnt even need more than 250 °C max. Temperature.

Might try some sublingual stuff in future. Here you can find some dosages for Psychoactivity Threashold derived by Jonathan Ott, quite the same study like above the link at Bufotenin from him.

Many people have debated about Harmala Solubility and what to use if making Changa. Myself I had the feeling like they are soluble in exactly nothing. Here are the most common solvents, from good to bad.

Seems like from any good solvent DCM would still be the most healthy one. DMSO is totally healthy, but will never evaporate, so this does not help for Changa people. But if you can be sure to 1000 % evaporate stuff, then Methanol would also be an option. If being more on a safe side, Ethanol is then the best. It is also possible to just prepare everything in an even 1-layer and just sprinkle the Harmalas on top.

Interesting, I thought it would be ways above DMT. That means that vaporizers like the Crafty / Mighty can indeed also partioally vaporize Harmalas, it was always stated they could only be used for infused herb. Maybe in future I may test Harmin and Harmalin on their own, for now only the mixture. But they should not differ too much anyways.

In contrast to DMT we can see a slight absorption in the visible range (> 350 nm). Thats why Harmalas are not colorless. They have the same molecular size, but the chromophor has a slightly bigger pi-system. Thats because it's partially reduced and carries more pi-electrons and therefore the energy between lowest occupied orbital and highest non-occupied is smaller. This will shift the absorption towards lower energies aka. higher wavelengths. I bet that if you would measure it for ONLY Harmin and ONLY Harmalin you would see that the 350 nm+ absorption is caused by Harmin - as it has the biggest pi-system and should therefore be mostly causing the coloration.

Here is the thermogravimetric analysis of Harmala Alkaloids. Heating rate is 10 K / min. What you can see here is the mass loss of a sample while heating. Thats very nicely demonstrating any evaporation effects. So what you see here: First Vaporization starts at 192 °C and ends at 270 °C. Sadly we can see the same thing as with Bufotenine - very ineffective vaporization and most of the material will just undergo pyrolysis and form a black tar residue. At 250 °C only 25 % of the Harmalas evaporated even though the temperature program is very gentle and only 8 mg of sample have been used. So this once again shows smoking harmalas may not be the most rewarding ROA.

Here is the differential scanning calorimetry analysis of Harmala Alkaloids. Heating rate is 10 K / min. What you can see here is the uptake or release of Enthalpy of the sample while heating. Thats very nicely demonstrating any phase transition effects like crystalization / melting. A rising graph indicates an endothermic process, which consumes energy and a decreasing graph vice-versa. So what you see here: Basically nothing hehe. Just confirming the Ghetto-Hot-Plate-Experiments there is no melting point and Harmalas sublimate directly.

400 mg Harmala Alkaloids were eaten. Just a quick test to verify whether they indeed also contribute to Nausea. Intense vomiting. Nausea for hours. Really strong effect, like a mixture of LSD / stoned. Walking not easy. All in all bad experience.

Phase Transitions:

Melting Point derived from DSC
188 °C onset
199 °C Peak maximum

Literature: 187 - 190 °C


Vaporization Temperature from TGA
Starting from 190 °C+


IR-Spectrum (measured in attenuated total reflection method (ATR))




UV-Vis spectrum (Acetontril, didnt write down concentration)






Thermogravimetric Analysis (TGA) (Heating rate = 10 K / min)






Differential Scanning Calorimetry (DSC) (Heating rate = 10 K / min)






Bioassay:

Phase Transitions:

Deleted hot-plate experiments with IR Thermometer - just directly check TGA / DSC.


IR-Spectrum (measured in attenuated total reflection method (ATR))




UV-Vis spectrum (2 mg/ml in Acetonitril)






Thermogravimetric Analysis (TGA) (Heating rate = 10 K / min)








Differential Scanning Calorimetry (DSC) (Heating rate = 10 K / min)








Comments:

Salvinorin is a weird drug: It has no nitrogen, neither being a Monoamine nor even an Alkaloid. It is classified as Diterpenoid, a group of plant-derived components that originate from Isopren Polymerization. Also it does not interact with any of the 5-HT receptor family, instead κ-Opioid receptors. Therefore it is quite of an oddity in the world of psychedelics and anyways in Literature is is instead described as a Dissociative. Being a Diterpenoid it is also absorbing super weak, therefore naturally is invisible in a TLC and the absorption spectra looks super boring ... Still it is noteable that this big guy can be vaporized, according to the molecular mass I would assume it would rather decompose, but not having too many reactive species like double bonds or amines, this probably saves the molecule from disintegrating too early on heating. Anyways, that route is the only viable option as it is quite accepted that any other ROA (snorting / eating / quidding) requires other plant actives to make if bioavailable these ways, which are lost upon isolating the pure compound. Still I'm quite interested how a pure Salvinorin A + Cyclodextrin Nose Spray would work.

Close-Up: (sharp colourless needles - ouch - see more crystals here)

boiling IPA (78°C)
3,5 g in 100 ml
350 mg in 10 ml

IPA in the freezer (-20°C)
530 mg in 100 ml
53 mg in 10 ml

Mescaline can be extracted and solidified as a Freebase compound, but it will quickly react with CO2 and H2O from atmosphere to form Mescaline Carbonate. Hence all TEKs come with a way to produce the respective mescaline salt in the end, as storing it as a Freebase (like DMT) will not work. Regarding solubility a salt which is produced from a strong acid like HCl or H2SO4 will only dissolve in water or water:alcohol mixtures. CIELO as the go-to TEK for Mescaline will produce Mescaline Citrate, which is a salt from a weaker organic base and therefore it has a reasonable solubility even in pure alcohols (like EtOH / IPA). Therefore those can be used conveniently to recrystallize it, but obviously if you got some pretty crystals directly from the CIELO Tek this will probably not be mandatory

Besides very soluble in Room Temperature Water and DMSO.

Note that Mescaline Citrate does not dissolve in Acetonitril in the concentration required, so Methanol had to be used. Now you may say this spectrum is kind of boring, not showing any absorption in the visible range (400 - 700 nm), thus this compound will simply be some white crystals, with at maximum some greyish tints from remaining Chlorophyll. But actually we could take the time to discuss a bit about photochemistry here, when comparing to (the structurally very different) other Tryptamines listed here. Both show an absorption maximum at 270 nm (Mescaline) and 280 nm (DMT). This is quite in the same range, Mescaline just being a little more narrow and *shifted left*, hence it needs a little more energy to show absorption.

The actual absorption spectrum or more precisely the position on the X-Axis of an absorption peak and also the width of the peak itself is determined by the molecular structure of a compound. Easily spoken, the more pi-electrons (AKA doublebonds) a molecule has, the more the peak is shifted to the right side AKA more likely that it will result in the molecule being colourful to us. This effect is much stronger if those double bonds are in close proximity, thus constructing aromatic ring systems. Now this effect is even more increased if we add more groups onto those rings, which will push and pull electrons across those rings.

Now after all that theory, we can see why all of these compounds have exactly those absorption spectra:

Mescaline has the smallest aromatic system of only 6 conjugated pi electrons. Its absorption spectrum is the furthest on the left side with the smallest width. Moving to DMT it has an additional conjugated 5 membered ring with 3 more conjugated pi electrons. Therefore the absorption maximum is shifted to the right and has a bigger width. Now attaching a Methoxy group (5-MeO-...) or Hydroxy group (Bufo) will further increase the peak width. When finally moving to Harmalas the pi system has the biggest size, therefore the absorption is so far extended that we start seeing this compound as being colourfull. This is also the reason why Mescaline in general has the weakest absorption: We have to use roughly the 2x - 3x concentration for the same absorption strength - Tryptamines usually only require 0,2-0,5 mg / ml.

As stated before TGA shows the evaporation of a compound across an increasing temperature ramp. Normally you would say why measure the evaporation of something not intended for smoking, but well here we have it. Wikipedia tells that citric acid will undergo thermal degradation after 175°C. This is also what we probably can read from this data. First there is no clean evaporation, which would result in a slowly increasing slope and transitioning fast towards 0 % Mass (on Y-Axis). Instead we see some mass decrease even at lower temperatures before 150°C and then moving down to 40 % mass in plateaus. This indicates no full evaporation, which always is a good hint that a lot of product just ends up in pyrolysis and charred to a black mass, also the multiple plateaus may indicate a sequence of decomposition reactions. So in total you might not be able to vaporize this compound efficiently, though it would still be perfectly usable for nebulizing devices.
With some additional hotplate experiments I just observed formation of a black tar above 200°C with only minimal vapor release.

As stated before DSC shows the occurence of energy releasing or uptaking processes like melting or decomposition across an increasing temperature ramp. Here we can see a melting point of Mescaline Citrate with an onset at 102°C and a max at 120°C. The peak is astonishingly broad and not very sharp as other Tryptamines. When observed by eye I could see myself that it first starts liquifying to a sticky blob at around 120°C and not forming a real molten liquid. This may correspond to the unusual melting peak seen in DSC. Still if there is no real reason vaporizing this salt it might not matter at all that it cant be formed into a true liquid easily.

Toluene (20°C)
1,4 g in 100 ml
140 mg in 10 ml

Hot Limonene (150°C)
2,5 g in 100 ml
250 mg in 10 ml

Limonene (20°C)
500 mg in 100 ml
50 mg in 10 ml

Mescaline Benzoate has a mediocre solubility in non-polar solvents (which at least contain some double bonds) so those can be used to combine both Mescaline Freebase and Benzoic Acid and then precipitate the resulting salt. The solubility seems to be similar to the one of DMT Benzoate. Therefore if handling a big volume of Toluene, then chances are that you have too much liquid to start precipitation. Therefore it seems not feasible to extract with Toluene from the cactus, because you will end up with a too low concentration for crystal growth.

Furthermore this data is only valid if handling exactly the pure Mescaline Benzoate. If extracting from a cactus then the liquids will contain some more compounds, which might actually stabilize the Mescaline Benzoate in the mixture, therefore making it more soluble to a degree where it will even not precipitate if you concentrate evaporate the liquid even more. Therefore you will be only safe to use the numbers as shown above if you know that the Toluene and Limonene will not contain other substances.

Pure Benzoic Acid solubility at 20°C is 70 mg / 1 ml in Toluene and 47 mg / 1 ml in Limonene. Use these numbers to make sure that you dont go below that concentration, so any precipitation can only be your Mescaline Benzoate.

Besides very soluble in Room Temperature Water and DMSO. Soluble in EtOH, IPA. Lower solubility in Ethyl Acetate.

Similar to the spectrum measured for Mescaline Citrate the shape of the absorption peak is not very interesting ... but we can see something else: In contrast to Mescaline Citrate we now have an acid anion which also will absorb light at 270 nm. Benzoic Acid has the same absorbing unit (simply being a phenyl ring) and thus both molecules of the salt will absorb at the same wavelength, increasing the absorption quite a lot. Therefore much less material was used to measure a similar absorption strength. I would have expected that the peak of Benzoic Acid would be a little more shifted left (because it lacks the 3x Methoxy groups). Still that seems not the case and we get exactly the same shape of the peak.

As stated before TGA shows the evaporation of a compound across an increasing temperature ramp. Prior we measured the TGA for Mescaline Citrate and it looked like it would mostly undergo pyrolysis instead of a clean evaporation. But as seen already for DMT and Bufotenin the salt created with Benzoic Acid seems to also evaporate very cleanly and efficient. This might be caused as for true vaporization only the nucleation of small droplets in air is mandatory, which will drag up all the liquid in form of vapor over time - read more about this here. Therefore salts created from Benzoic Acid vaporize basically like their Freebase analogues. This was tested here and indeed the vaporization courve is very pretty! It shows a very harmonic drop starting at around 168°C and the vaporization stops at first just above 10 % before 250°C, so it can be evaporated very clean. Afterwards there is a small further drop to nearly 0 %, but no idea what this unusual final part is, anyways the vaporization curve looks perfect for vaporizing this salt. Indeed I tried it and it works very smooth and clean, read more about this here. Still obviously it is a debate if smoking Mescaline is worth it, as it is in general a "weak drug" due to the very fast metabolism inherited by its chemical structure. I tested it only with 25 mg Freebase Mescaline Equivalent and the effect did not include any OEVs / CEVs.

As stated before DSC shows the occurence of energy releasing or uptaking processes like melting or decomposition across an increasing temperature ramp. Luckily I will go pretty sure with the excuse that I dont have much knowledge in DSC and therefore my wisdom is simply just enough to always write those short paragraphs at each substance. Based on that looking on this spectrum I have no idea why it has this weird shape. Pretty safely it shows a melting point with an onset at 122°C and a max at 129 °C. This also corresponds pretty nicely with salts from other organic acids, which also were measured between 120 - 170°C. Mescaline freebase as a pure compound is melting very low at just above 30°C IIRC, so it's probably reasonable that the -Benzoate salt melts a little lower than the DMT-Benzoate. But besides that you first see a new maximum at around 150°C. That is weird because there should not be 2 melting points. Later you can again see a new maximum at around 230°C. Also this whole curve has a weird slope upwards. Therefore I happily tell I am a noobie in this thermal analysis science, so maybe a process is happening which other people might explain at some point xD.

Mescaline Citrate [coming]