[TerpChild]

Mark, my apologies, I guess acetone has been used for a while to extract. Sounds like the safest of the three you tried and sounds like you know how to purge it well, maybe you have a winner there for your situation.
Also i dunno what your bho tech is but it sounds suspicious. Breaking boiling-naptha filled pyrex dish on a burner? You should not be heating bho that high, ever. Also naptha and butane are not the same thing.

[SkyHighLer]

Originally Posted by G.O. Joe

Such cans of denatured alcohol are almost always SD-1 or SD-3A alcohol with an equal volume of methanol. In other words, expect at least 50% methyl alcohol from hardware stores.

Naphtha in the can is usually partially high boilers that will not evaporate easily. The lower boiling portion is acceptable, if it's pure alkanes.

Toluene is not the best residual solvent because larger amounts may cause drain bamage. Acetone has been a hot button topic here, at times.

Originally Posted by markjs

Thus using VM&P Naptha, which is purposefully lighter so as to make a fast drying paint thinner.

Again, purge, purge, purge! Do that well and at worst, the amunt f residuals should be minuscule.

Am I gonna claim total safety? Not at all, but I would say, many people in boat building locally inhale more of all of this stuff than I ever will, even with the masks.

The straight answer as usual was delivered succinctly by G.O. Joe, and on just one point I'll present a clear 360 factual up skirt to your slough.



https://en.wikipedia.org/wiki/Naphtha#Types

"Various qualifiers have been added to the term "naphtha" by various sources in an effort to make it more specific:

One source[9] differentiates by boiling point:

Light naphtha is the fraction boiling between 30 °C and 90 °C and consists of molecules with 5–6 carbon atoms. Heavy naphtha boils between 90 °C and 200 °C and consists of molecules with 6–12 carbons.

Another source[10] differentiates light and heavy based on hydrocarbon structure:

Light [is] a mixture consisting mainly of straight-chained and cyclic aliphatic hydrocarbons having from five to nine carbon atoms per molecule. Heavy [is] a mixture consisting mainly of straight-chained and cyclic aliphatic hydrocarbons having from seven to nine carbons per molecule.

Both of these are useful definitions, but they are incompatible with one another. These terms are also sufficiently broad that they are not widely useful."



https://en.wikipedia.org/wiki/Petroleum_ether

"Petroleum ether is the petroleum fraction consisting of aliphatic hydrocarbons and boiling in the range 35‒60 °C; commonly used as a laboratory solvent.[4] The term ether is used only figuratively, signifying extreme lightness and volatility.

Properties
The very lightest, most volatile liquid hydrocarbon solvents that can be bought from laboratory chemical suppliers may also be offered under the name petroleum ether. Petroleum ether consists mainly of aliphatic hydrocarbons and is usually low on aromatics. It is commonly hydrodesulfurized and may be hydrogenated to reduce the amount of aromatic and other unsaturated hydrocarbons. [b]Petroleum ether bears normally a descriptive suffix giving the boiling range. Thus, from the leading international laboratory chemical suppliers it is possible to buy various petroleum ethers with boiling ranges such as 30-50 °C, 40-60 °C, 50-70 °C, 60-80 °C, etc. In the United States, laboratory grade aliphatic hydrocarbon solvents with boiling ranges as high as 100-140 °C may be called petroleum ether, rather than petroleum spirit.[5][/i]

It is not advisable to employ a fraction with a wider boiling point range than 20 °C, because of possible loss of the more volatile portion during its use in recrystallisation, etc. and consequent different solubility relations of the higher boiling residue.[6]"



https://en.wikipedia.org/wiki/Petrol...tha#Other_uses

"Sometimes the specialty naphthas are called petroleum ether, petroleum spirits, mineral spirits, paraffin, benzine, hexanes, ligroin, white oil or white gas, painters naphtha, refined solvent naphtha and Varnish makers' & painters' naphtha (VM&P) . The best way to determine the boiling range and other compositional characteristics of any of the specialty naphthas is to read the Safety Data Sheet (SDS) for the specific naphtha of interest."



https://en.wikipedia.org/wiki/Petroleum_benzine

"Petroleum benzine is a hydrocarbon based solvent mixture that is classified by its physical properties (e.g. boiling point, vapor pressure) rather than a specific chemical composition, often obfuscating distinction within the long list of petroleum distillate solvent mixtures: mineral spirits, naphtha, white spirits, petroleum spirits, turps substitute, mineral turpentine, petroleum benzine, petroleum ether, ligroin, and Stoddard Solvent. The chemical composition of a petroleum distillate can also be modified to afford a solvent with reduced concentration of unsaturated hydrocarbons, i.e. alkenes, by hydrotreating and/or reduced aromatics, e.g. benzene, toluene xylene, by several dearomatization methods. In a document that attempts to draw more concise distinctions between hydrocarbon solvents, conservator Alan Phenix explains that the most important distinction amongst the various hydrocarbon solvents are their boiling/distillation ranges (and, by association, volatility, flash point etc.) and aromatic content.[1] Given the toxicity/carcinogenicity of some aromatic hydrocarbons, most notably benzene, the aromatic content of petroleum distillate solvents, which would normally be in the 10-25% (w/w) range for most petroleum fractions, can be advantageously reduced when their special solvation properties are not required and a less odorous, lower toxicity solvent is desired, especially when present in consumer products. Phenix further points out that "To all intents and purposes petroleum benzine appears synonymous with petroleum spirit." Petroleum spirit is generally considered to be the fractions between the very lightest hydrocarbons, petroleum ether, and the heavier distillates, mineral spirits. For example, petroleum benzine with a boiling range of 36 - 83 °C sold by EMD Millipore under CAS-No. 64742-49-0 is identified in the product MSDS as hydrotreated light petroleum distillates comprising ≥ 90% C5-C7 hydrocarbons, n-alkanes, isoalkanes, and < 5% n-hexane, while Santa Cruz Biotechnology sells a petroleum ether product under the same CAS-No. Fisher Scientific offers a product ‘Benzine (Petroleum Naphtha)' that retails for a high price that would suggest it is a speciality product but in fact conforms to Marathon Petroleum's 'VM&P Naphtha' (Varnish Makers & Painters’ Naphtha) found widely distributed in many hardware stores in North America.[2]

According to their corresponding MSDS, most commercially offered petroleum benzine solvents consist of parrafins (alkanes) with chain lengths of C5 to C9 (i.e. n-pentane to n-nonane and their isomers), cycloparaffins (cyclopentane, cyclohexane, ethylcyclopentane, etc.) and aromatic hydrocarbons (benzene, toluene, xylene, etc.). The TSCA Definition 2008 describes petroleum benzine as "a complex combination of hydrocarbons obtained by treating a petroleum fraction with hydrogen in the presence of a catalyst. It consists of hydrocarbons having carbon numbers predominantly in the range of C4 through C11 and boiling in the range of approximately -20°C to 190°C."

Health concerns
Beginning in the 1960s and 70's, the high incidence rate of polyneuropathy amongst industrial workers chronically exposed to petroleum benzine and other hydrocarbon solvents prompted investigations into the safety of chronic exposure to petroleum distillates.[3][4][5] Many of the cases of polyneuropathy amongst workers chronically exposed to vapors of petroleum benzine and similar solvents have been attributed to the n-hexane component of these mixtures. Using an animal model (Wistar-strain male rats), Ono and coworkers[6] reported that chronic exposure (12 h a day for 24 weeks) to hydrocarbon solvent vapors conspicuously impaired peripheral nerve function in the 500 ppm n-hexane group, slightly impaired in the 200 ppm n-hexane group and petroleum benzine II group (containing 500 ppm n-hexane), and barely impaired in the petroleum benzine I group (containing 200 ppm n-hexane). These results suggest that some components in petroleum benzine are likely to antagonize the neurotoxic effects of n-hexane to the peripheral nerves, possibly by inhibiting the oxidation of n-hexane to its more toxic metabolites 2-hexanone and 2,5-hexanedione. Ono and coworkers also observed depressed body weight gains amongst the exposed groups compared to the control group in the order: petroleum benzine II > petroleum benzine I (ccontaining 200 ppm n-hexane) >> 500 ppm n-hexane > 200 ppm n-hexane. These results suggest that other components found in petroleum benzine may have an additive, syngeristic or potentiative effects on the biological effects of n-hexane.[7] Namely, 1000 ppm n-hexane, 3000 ppm n-heptane and 1000 ppm toluene were reported to have the effect of depressing the body weight gain of rats.[8]"



https://en.wikipedia.org/wiki/Coleman_fuel

"Coleman fuel is a petroleum naphtha product marketed by The Coleman Company. Historically called white gas (not white spirit), it is a liquid petroleum fuel (100% light hydrotreated distillate) usually sold in one gallon cans.[1] It is used primarily for fueling lanterns and camp stoves. Additionally, it is a popular fuel for fire dancing. Originally, it was simply casing-head gas or drip gas which has similar properties. Drip gas was sold commercially at gas stations and hardware stores in North America until the early 1950s. The white gas sold today is a similar product but is produced at refineries with the benzene removed.[2][unreliable source?]

Coleman fuel is a mixture of cyclohexane, nonane, octane, heptane, and pentane.[3]

Though Coleman fuel has an octane rating of 50 to 55 and a flammability similar to gasoline, it has none of the additives found in modern gasoline and should not be used as a substitute for gasoline.[citation needed] While it will function as a fuel for gasoline engines, its high combustion temperature and lack of octane boosting additives could damage engine valves[citation needed], while its low octane rating and lack of anti-knock agents can produce knocking that could lead to bearing and piston rod damage, so such use should only be considered for emergencies and/or very short distances. And like gasoline, it should not be used as a substitute for kerosene or diesel fuel. However, it is quite popular as a fuel for model engines, where the low octane rating is not a problem, additives are unwanted, and the clean burning, low odor and longer shelf life are considered advantages."



https://en.wikipedia.org/wiki/Pentane

"Pentane is an organic compound with the formula C5H12 — that is, an alkane with five carbon atoms. The term may refer to any of three structural isomers, or to a mixture of them: in the IUPAC nomenclature, however, pentane means exclusively the n-pentane isomer; the other two are called isopentane (methylbutane) and neopentane (dimethylpropane). Cyclopentane is not an isomer of pentane because it has only 10 hydrogen atoms where pentane has 12.

Pentanes are components of some fuels and are employed as specialty solvents in the laboratory. Their properties are very similar to those of butanes and hexanes.

<snip>

Laboratory use
Pentanes are relatively inexpensive and are the most volatile liquid alkanes at room temperature, so they are often used in the laboratory as solvents that can be conveniently and rapidly evaporated. However, because of their nonpolarity and lack of functionality, they dissolve only non-polar and alkyl-rich compounds. Pentanes are miscible with most common nonpolar solvents such as chlorocarbons, aromatics, and ethers. They are often used in liquid chromatography."



My conclusion is pentane (36C Bp,) or low (35-60C) Bp petroleum ether are preferable for health reasons.


(Chemsavers) Petroleum Ether (Ligroin), ACS, 35-60°C, 500ml (16oz)
For Research & Development
Not for drug, clinical use in humans, for food or food additive use

Specifications:
Meets ACS Specifications
Boiling range 35° - 60°C Pass
Color (A.P.H.A.) <10
Acidity Pass
Copper corrosion Pass
Doctor Test - Negative - Pass
Residue after evaporation <10ppm
Sulfur <5ppm
Benzene (GC) <2ppm

CAS: 8032-32-4"

[hamstring]

"I've done QWISO many times over the years and never come up with a product you could put in a dabber that didn't look black and taste nasty I hear cold is key, tried it, still was never happy with vaping the end product, stony, but bad nasty taste and dark color Would consider trying activated charcoal, but yeah, just never found this to make anything better than smoking quality Throw it on a bud, smoke it, then it taste fine."

I'm not as qualified as most of the guys who are already helping you but I will comment on QWISO because I have some experience. If you are getting black and nasty tasting concentrate I would say its the starting material and not the method of extraction. I use QWISO extraction and use a vacuum chamber and the end result is just fine. Could it be better with out a doubt but in my opinion the rest is just bragging rights.

[TerpChild]

Acetone bp is 56C according to google. Looks like its a valid choice if you purge at around 140F to be safe.
Hey SH can pentane be ordered by individuals? I am curious about using it because it has such a low bp relative to acetone or iso (86C).

[markjs]

Toluene is my next batch Blew some nice BHO today, maybe toluene batch tomorrow Very optimistic because I have read good things (what little I have) and that its polar and will get more good and less gunk.

[markjs]

Sorry, non polar.

[PDX Dopesmoker]

If you're looking to try new solvents to make tastier extracts then why not see if you can pull off Horatio Delbert's limonene extraction trick?

[markjs]

Originally Posted by PDX Dopesmoker

If you're looking to try new solvents to make tastier extracts then why not see if you can pull off Horatio Delbert's limonene extraction trick?

That doesn't even make sense to me?!? Firstly, whatever limonene is, it's certainly not readily and cheaply available to me.

Secondly, how ever would one purge a solvent with a higher boiling point than THC?

[markjs]

Originally Posted by TerpChild

Acetone bp is 56C according to google. Looks like its a valid choice if you purge at around 140F to be safe.
Hey SH can pentane be ordered by individuals? I am curious about using it because it has such a low bp relative to acetone or iso (86C).

I purge in a rice cooker, so I imagine right around 212f or 100c, water boiling point.

[SkyHighLer]

Originally Posted by TerpChild

Acetone bp is 56C according to google. Looks like its a valid choice if you purge at around 140F to be safe.
Hey SH can pentane be ordered by individuals? I am curious about using it because it has such a low bp relative to acetone or iso (86C).

Anyone can easily purchase 98% reagent grade n-pentane from eBay, thought it's not cheap.

Here's a list of the pentane grades available from Fisher Scientific,

https://www.fishersci.com/us/en/cata...ne+grades&nav=


Looks to me like the best deal is four liter bottles of Fisher's HPLC grade,

https://www.fishersci.com/shop/produ...pentane+grades

I just tried placing an order and was directed to inquire of California purchase restrictions. So I sent them an inquiry.