Unfortunately, some of those are the potentially lethal NBOMes.
Yes, you could test, but tests from ecstasydata.org cost $100, and only tests that one sample you send. It also takes a couple of weeks to get results.
That kind of outlay of time and money is only going to be acceptable to a small minority of users, and the unfortunate fact is that most users will not test.
The real solution is to get LSD legalized and then safety and purity could be assured.
Another alternative is to try some other psychedelics, like:
- Salvia Divinorum, which is legal in many places
- MDMA, which is likely to be rescheduled next year and then can be used legally under the supervision of a therapist (which can already be done under limited circumstances)
- Psilocybin, which will probably be rescheduled within the next 5 years, and can then also be used legally under the supervision of a therapist
- Ketamine, which can be legally prescribed for depression right now (search around for Ketamine clinics)
- Peyote or Ayahuasca, if you're part of certain religious groups
- Psilocybin mushrooms, which you could pick (be careful!!!) or grow.
- Psychedelic cacti, which you could grow. But, unfortunately they take a really long time to grow, and over-harvesting of peyote (for example) is a very serious sustainability problem.
- Cannabis, which can have psychedelic effects at high doses.
Being part of a legitimate medical research study can also get you access to pure LSD, and a limited amount of such research is now ongoing and planned.
It's easy to misread a reagent test[1], and they won't tell you all the substances that are in a sample, just the particular sample(s) they test for.
GC/MS is much more definitive, in that it'll tell you every known substance that's in your sample (though, unfortunately, ecstasydata is forbidden by the DEA from telling you the amount of each substance they find[2] -- another stupid and harmful result of the War on Drugs).
Still, reagent testing (when done carefully, knowledgeably, and properly) is definitely a whole lot better than no testing at all.
[1] - For example, was that color you saw black or dark brown or dark violet? Did you wait long enough for the color to change? Did you look at the reagent color under the same lighting as the light you looked at the reference under, and was that lighting adequate enough to differentiate between all the different colors properly? It matters!
If it's not real, the dose size is so small (micrograms), that you aren't likely to experience anything at all.
But yeah, you don't buy it from a street corner dealer, you get it from a friend, who tells you they tried it and it's real. If you don't have friends that do this kind of thing that you trust, I wouldn't bother.
"If it's bitter, its a spitter"
That's not the point. NBOMe compounds also fit on blotter paper with similar potency to LSD, yet have significantly more dangerous side effect profiles.
https://psychonautwiki.org/wiki/25I-NBOMe#Toxicity_and_harm_...
Also if it's bitter don't take it.
Don't just swallow potentially lethal substances!
Test them (don't taste them!) first if you're not sure what they are.
If you're tasting something that can kill you it's already too late.