Hmm… maybe a little chemistry lesson is needed here.
Poppers are nitrited alcohols They all work the same way. You inhale them, and then they re-break into the alcohol and the gas in your bloodstream. You get high off the gas part, and then your body has to break down the alcohol part.
amyl uses a 5 carbon alcohol
butyl uses a 4 carbon alcohol
isopropyl uses a 3 carbon alcohol
ethyl is 2 carbon
methyl is 1 carbon.
The longer the chain, the more stable it is when it's a popper. 2 and 1 carbon poppers are not liquid at room temp, so I have some doubts about going blind as a real thing, because that's a methyl alcohol issue. If you ingest wood grain alcohol, your liver turns it into a kinda formaldehyde that can pickle your optic nerves which is why it can make you blind. But poppers in a bottle shouldn't be able to have a nitrated methanol, so the only way it would be in there is if some dumb ass put methyl alcohol in the mix for no good reason after the poppers were made.
So. maybe we should understand how you make poppers.
It's a very simple thing.
You take an acid, mix it with water, chill it with ice, and then stir in the alcohol. Then you mix in sodium nitrite (used for bio diesel, and meat preservation) The acid breaks the sodium nitrite into nitric oxide gas, which then bonds to the alcohol, and then it floats to the top. You skim off the stuff on the top, and you've got poppers. It's about as difficult as making a cake. All the ingredients are legal, and you can get them on amazon, except pentanol, which is 5 carbon and used to make amyl. That stuff.. I've never been able to find outside a controlled chemical supplier.
Anyway, that leaves isopropyl(yes.. rubbing alcohol) and isobutyl as the ones easy to get.
Most poppers are one or the other because it's just easier. Although some mix. Amyl(5 carbon from pentanol) is a controlled substance and is included in some emergency kits and is treated as a medicine.
What you experience as differences.. is usually not really a difference in how it was made. Because the poppers float in water, the purity ends up being very high because the ingredients are so simple.
They end up seeming different because they start to break down as soon as they are made, and as they break down more, they smell different depending on how much nitric oxide and alcohol it has reverted to. That's why the "fresh" is important, and why when you get a new bottle it's different than when you're at the end of the bottle, or you kept it too long.
There's a couple things you can do to make it last longer.
- keep it in the freezer. When it's cold, it breaks down faster. But also, when it's cold, the nitric oxide gas recombines with the alcohol back into poppers. That's why you have to chill everything when it's made.
- get some glycerine and put a bit in the bottle after you open it. Glycerine is used making soap, cosmetics. You can find it at walgreens or the grocery sometimes. The glycerine absorbs the broken down stuff and keeps you from inhaling it, which makes it smell fresher longer.