Saw some older posts about this, but figured that more recent opinions are good to hear too.

Overall, cleanness/affordability-wise what are y'all's favorite ones? I'm still torn between naphtha and heptane, but I'm leaning towards naphtha. Either way though, I appreciate any recommendations.

Also, as a sidenote, I recently evap tested Crown's White Gas Camp Fuel and it was terrible. Left a faint transparent spot and also left a horrific residual smell, strong enough to give me a headache just by slightly wafting the dried glass. I planned to try it after seeing a poster just last year use it, but after seeing that, (and seeing the current SDS after requesting it -- Make sure your SDSs are up to date!) it looks like it's gotten a lot dirtier than it once was. I'm getting more sketched out about even the higher-purity paint thinner/fuel-branded solvents as I read more about them tbh, but also don't have a lot of extra money to spend on a solvent alone.

Naphtha pulls a wider range of plant fats and oils while N-Heptane is more selective.

VM&P Naphtha can be found at most hardware stores, although some states it is now banned including California and Maryland. Some areas in the UK are banning as well.

BUT You can still get it off of Amazon.

I use Bestine solvent thinner. It's N-Heptane and it worked quite well. You can refer to my A/B Tek to look at the results.

Some notes on the Bestine.

Flash Point: -9C(15.8F) to -6.7C(20 F)

Evap Test: Passed (no residue left over, it evaporated completely, leaving zero smell)

Bestine MSDS

Bestine MSDS 2

Bestine is not pure n-Heptane but rather a collection of heptane isomers, like 2-methylhexane. You can see that by distilling it: there will be fractions that boil substantially below 98.38 °C. That has no implications on DMT extraction, and I would not recommend isolating n-Heptane just for that purpose.