I've seen hazard symbols, even skull-and-crossbones sigils on RCs, materials intended for human consumption, with the hazard symbols added as boilerplate bollocks that everybody knows full well is just arse-covering intended to protect the companies, who know damn well that the purchasers know damn well they know damn well that said customers are going to put their merchandise down their neck, up their arse, up the nose, in their veins and whatever else one could think of bar intrathecal injection or ICV administration.
The nitrostyrenes, nitropropenes, are DEFINITELY NOT, however, fit for human consumption.
Whether or not nitro>amine reduction occurs in vivo, it isn't something one wants to try.
To put it into perspective, this being a nitropropene, rather than nitrostyrene, unsubstituted 1-phenyl-2-beta-nitropropene, before figuring out a simple rolled up wad of bog roll in the flask neck would prevent the vapor escaping, first time with the particular reaction protocol, a solventless Knoevanagel, equimolar nitroethane, benzaldehyde, all ACS grade, so this was due to the nitroalkene itself, no GAA present to give off choking acid fumes, and the amine catalyst, a mixture of 90% triethylenetetramine, and 10% 3,6-diazooctaneethylenediamine, both as acetate salts, prepared via neutralization of GAA with the mixed amines;
Followed by microwaving the reaction mixture, at the first try, 15-20 min total irradiation time, although subsequently efforts have been made at refining the process, intermittent irradiation-cooling cycles, cold water bath back to RT after irradiation at 65-70 'C, never deliberately allowing it to rise above 85 'C, unstirred, due to lacking a suitable stirrer-equipped microwave, either specially designed, or hacked by the chemist who performed this.
I was present to witness it, and before that chemist figured out the use of a bog-roll plug in the flask neck, in order to allow pressure to remain normal, since a stopper and clip would result in overpressure and explosion, without a doubt, especially given MW irradiation heating behaves rather non-linearly, from 20 'C to 60-70 might take 15 seconds, but from 40 to 120 might well shoot up there in a few seconds (the 15s figure is not correct, it's to illustrate the point of how differently the temperature will rise dependent upon the temperature a liquid is at before microwaving), in this case, it was a 900 watt household microwave oven. 15-20min, rather than 6 hours on a steam bath, better purity, even visually, no orange discoloration of the P2NP, nice and yellow, as it ought to be, still needs recrystallization of course, and washing, etc.to remove the catalyst, washing with bisulfite solution to adduct out any benz left over unreacted, by heating the mixed adduct/nitropropene in dry isopropanol, followed by saturated NaCl brine washes to dispose of any decomp. remnants of bisulfite/metabisulfite used (the aldehyde precursor must be stripped out thoroughly, for certain methods of reduction, in particular, the in-situ generation and use of copper boride from CuCl2/NaBH4, this working not on the nitropropene; but is used rather, on the nitropropANE, prepared via reduction of the double bond using excess borohydride (if not in excess, a parasitic Michael addition can take place 'twixt nitroalkene and nitroalkane, the result being polymerized shite, which cannot be salvaged, and is fit only for incineration as organic garbage, and for practicing one's multilingual swearing. So a 5-6 fold molar excess of borohydride ought to be used, in order that the first thing a molecule of incoming nitroalkene meets, is a molecule of borohydride, even when there has been plenty nitroalkane formed as the boro does it's job and reduces that pesky wee double bond, allowing then, techniques for reduction of the nitro group that couldn't be used on the nitroalkene)
And with the copper boride technique, aldehydes apparently interfere with the reduction. So forming a bisulfite adduct, and taking advantage of their insolubility as a general principle, bisulfite adducts are insoluble as buggery in most anything you throw at them which doesn't actually react with one, then bringing to brief reflux in isopropanol, of an already saturated solution of the P2NP in dry iPA, allows one to dissolve the P2NP, leaving the bisulfite adduct of residual benzaldehyde still solid, to be vacuum-filtered off, bing, bang, buggrit, there you go, aldehyde goes bye-bye, and can even be recovered if one saves the adduct over multiple runs until there is enough to be worth hydrolyzing, if benzaldehyde is to the chemist, a scarce resource, to some it is, some must make it, scrounge it, rather than buy it.
The chemist running that MW synthesis I..watched, just fortunate enough that neither nitroethane or benzaldehyde in ACS grade are resources that are hard to obtain or excessively expensive. He has his ways
Anyhow, microwaving, that first time without the bog roll plug, goggles all round, which, unfortunately, before I replaced my own with a set with a nice comfy silicone rubber seal, the old set had air vents in the side. Fine for stopping something nasty splattering in your eyes, but where gases or vapourized things are about, not nice.
You've never seen someone swap gas masks (I've two, one better than the other, I don't trust the old one now, for anything mission-critical, after an incident whilst distilling iodine monochloride, where the non-return seal valve which makes sure that inhaled air is drawn through the filter cartridges, not directly inhaled from whatever is hanging around in the air, slipped off a retaining post, and I got a tiny breath of the stuff. Left me on an inhaler for a bit over a week (I'm not asthmatic, I just couldn't fucking breathe), had I not JUST managed to detect a really, really faint trace of a halogen-esque odour, as I always breathe via my nose when using a gas mask, so that IF something goes wrong, I'm more likely to know it, and be able to respond before something gets me....the ICl very nearly did. If I'd not detected that slight smell, not even enough to be irritating at the time, not like even a wee bit of chlorine or bromine in the air, no more irritating than the air one would breathe after opening a tub of iodine crystals that's been kept in the fridge without a mask, from 4 feet or so away, and of little more odor at the concentration concerned when the old mask slipped that valve, than one would perceive from holding a chunk of iodine maybe an inch long and a half inch to three quarter inch thick, and using one hand to waft air towards one's nose whilst holding the I2 'rock' in the other, fingers turning terrorist-brown of course.
If I'd not realized that the odor was due to the iodine monochloride, and despite it appearing non-threatening in terms of lack of irritation or coughing at the time, and run like fuck out of the area, that could well have killed me. That one tiny breath, was enough to really fuck me up, could barely breathe, wheezing, hacking, coughing, originally some slight haemoptysis, I was so close to going to hospital, only reason I didn't, is that I know my doctor, he knows me, and he's made home visits, seen glassware, knows I know chemistry from explaining why I wanted various medications as opposed to other particular ones, couldn't hide it so I was just open and said 'yeah, I like chemistry, I'm autistic, it's what I DO, go figure
)
And had I gone to hospital and said 'I've just been gassed by iodine monochloride because my gas mask shat a brick'......I can well imagine that A-the medics would have shat a few bricks of their own, not knowing that there IS a difference between 'person who practices chemistry outside a university or research institute' and 'worships Allah and wants nothing more to exterminate all infidel kaffir filth from the face of the earth' [i'm white, and atheist, but still, a great number of bog standard neurotypical citizens of various countries are chemophobic as hell, and think 'chemicals' are those things you keep under the sink in a cupboard, are scary, or else the sort of things found in nuclear plants, exotic, esoteric, occult-esque things handled by men in white coats with names that the citizen cannot pronounce and which terrify them]
And B-while my GP, who I've known for years, and who knows full well I'm a spazz chem/bio-freak, so I can be honest with him, I knew he wouldn't freak, call the cops (I was breaking no law, but the filth would nick you anyway, trash your lab, just because 'arrggh--he's got CHEMICALS!!! and GLASSWARE!!!' EVIL! HERESY! KILL IT WITH FIRE!')
And that he would trust my guidance on how to treat me, since of course, your average GP, or hospital doctor, has probably never HEARD of iodine monochloride, much less what to do if a patient comes in and says they've just been gassed by it.
Anyhow, that mask, off, the good new one on, QUICKLY, after the chemist doing the synth, had the non-linearity of microwave heating come into play, and briefly, the temperature of the batch of P2NP being prepared, the nitroethane/benzaldehyde/catalyst reaction mixture, it shot up like a rocket to the point of it refluxing, needing an instant response, dunking in a cooling bath, and once cooled enough to avoid thermal shock being a risk, on salted ice to bring the temperature down ASAP.
The vapour....fuck me, the vent holes to prevent fogging in those shitty older goggles, before I splashed out on a face visor, more like a diving mask, that seals tight to the face (it fogs, quickly, but a neat trick is to dilute some fairy liquid in tap water, dab a bit onto some kitchen towel or bog roll, and wipe it round the inside over the glass, the detergent stops it fogging up the visor), it let in the vapour of P2NP that was in the air, and my eyes were stinging like hell, changing masks, that wasn't fun either, left my nose streaming, me coughing and emitting a constant stream of gas mask-muffled profanity, whilst also resorting to profanities in american sign language just for good measure, even the areas of my face not covered by mask or visor, were stinging and irritated. Neck, etc. Head, you name it, it stung, anywhere the vapour could reach.
No injury done, but it was most unpleasant, after the temperature spike, and vaporization of unsubstituted P2NP.
Even not hot, just using methanol as a solvent (it's extremely soluble in methanol, more or less utterly insoluble in water), although using MeOH, it's asking for a pain in the ass, isopropanol is much better and much nicer to be working with as a solvent for P2NP), addition of MeOH to P2NP, if one is close enough to be in range of the vapor at all, gives off enough P2NP traces to be irritating. Hence the use of isopropanol, which also makes a much superior recrystallization solvent for the phenylnitropropene in question, it's just all around better chemically and better for the chemist in terms of being more pleasant to proceed thus.
So whilst I never have, and never will ingest it, I imagine that it would be, at the very most optimistic of the consequences of swallowing some, be extremely unpleasant. Not to mention that there's the potential for it to undergo a Nef reaction with the hydrochloric acid in the stomach, which would give the ketone, P2P (phenylacetone, 1-phenyl-2-propanone, another precursor well beloved of amphetamine chemists, either for reductive amination to form N-alkylamphetamines, or to go via the ketoxime and reduce to the primary amine, amphetamine itself, which for psychedelic amphetamines, the primary amine is pretty much critical, N-substitution with an alkyl group stomps on the psychedelic activity, with the exclusion of entactogen types like MD(M)A, but of course, simple stimulants, well, meth is well known as well known gets, and N-ethylamphetamine, whilst neither so potent by weight, as meth, nor as well known, it is still more potent by a significant degree compared to plain primary amine 'phet, shares in the long duration of meth, but is smoother than either of them.
IMO, it's the connoisseur's stimulant-type amphetamine. A fine ale, compared to a can of special brew, especially, if someone goes to the trouble of resolving the isomers, and tasting of the D-isomer alone, or else, running a biosynthesis which is enantioselective and produces enantiopure D-amphetamines, then, it'd be more the speed equivalent of a craft ale, served in a frosty mug on a roasting hot day, after one is fatigued, hungry, thirsty and generally shattered, with a big buggering great black forest gateaux with one's five pints of the best
But, the nitrostyrenes and nitropropenes used for preparing phenethylamines, amphetamines and some routes to some tryptamines, you do NOT want to ingest them, you don't even want to inhale the vapors, get the stuff on your bare skin, or scratch your nackers after pulling off your gloves and find you'd gotten a trace of the nitroalkene on your fingers, and thence onto one's testicular containment unit.
Believe you me, I'm not joking. Scratching your balls with unbeknownst to the ball-scratcher, those phenylnitroalkenes hiding on fingers from taking off the gloves, oh damn. Do it once, and you'll take your gloves off with a set of tweezers or surgical artery forceps every time you make a phenylnitroalkene for the rest of your life. It'll burn for HOURS, at the very least. Badly enough you might even get desperate enough to soak a towel in diluted isopropanol and scrub your bollocks until you can't bear the burning alcohol any longer, since water won't get it off.
One time, just the once, and you'll be so careful you'll make an expert neurosurgeon look like a drunken oaf with parkinson's disease, when it comes to removing your gloves.