Butane Honey Oil (BHO) extraction is an extremely dangerous activity. Butane is flammable, explosive and can potentially contain poisonous and harmful chemicals. Undertaking BHO extraction may result in serious bodily injury, or Death. The information provided on this website is strictly for educational purposes and in no way do the owners and staff of Overgrow.com encourage its production or use.
Butane is Highly Flammable and ALL extractions are to be done Outdoors Only, doing extractions indoor is extremely dangerous. There have been accounts of people blowing up their houses, kitchens, and bathrooms doing Butane and other solvent extractions indoors!
Butane gas is heavier than air and will pool in low areas, if left to collect butane gas becomes flammable when it reaches 1.8% to 8.5% concentration in air. A small breeze will keep the butane from being able to pool and become dangerous.
It is recommended you take every precaution possible. Wearing Safety Equipment such as Eye protection, as well as gloves and always keep a fire extinguisher near by.
- Nothing is more important than your safety!
- Do all butane extractions Outdoors or in Very well ventilated areas.
Never Smoke, have an open flame or source of ignition around when doing any kind of extraction, even outdoors
- Avoid static build up and even a small spark in the right conditions can be dangerous.
Butane & Health
It has been talked about a lot lately, some brand of butane add a smell to their butane. This smell is usually added to the butane so that humans can detect leaks, you will find it in large amounts in cheap butane, or camping butane. It can also potentially be in ?Clean? butane such as Colibri.
These chemicals are usually Mercaptans or Sulfur Dioxide (Rotten Egg Smell), using cheap butane with high levels of these is harmful. Do not use cheap butane or camping butane. It can also be harmful to use ?Clean? butane, so do so at your own risk.
It is not known what the effects of residues in butane honey oil are; it?s not even known for sure what if any residues are left over in butane honey oil after the butane is purged.
Only a Gas Chromatography/Mass Spectrometer can give us the info on what?s exactly is in our BHO. The search is on to find somewhere to get a sample tested. Until then, be aware of the potential health risks and judge for yourself if it?s worth it.
Not all butane is created equally; there are 2 different types of butane that make up the most common brands of butane. Isobutane and N-Butane.
Most cheap brands use Isobutane (2-METHYL PROPANE) and is more toxic and hazardous than N-Butane. For making Honey oil N-Butane is what we want, it extracts better and leaves very little to no residues in the oil.
Other brands use a mix of the different types, and some, like Colibri, use propane as well as Iso and n-butane
ISOBUTANE: -11.7 C
N-BUTANE: -0.5 C
No source of pure N-Butane has been found available in stores, only through Gas Supply Companies.
The best brand of butane I have used is Colibri Butane. I highly recommend Colibri, and you should be able to find it at most Fine Cigar and Tobacco Shoppe?s. Below is a list of other brands that are good for making Honey oil with. If you cannot find Colibri try to find one of the butane brands listed. And by all means avoid Ronson, Bernz-o-matic or other butane not listed below, they add smell to their butane and this smell is left behind making the oil taste very bad.
Other Brands that are good to use:
COLIBRI, NEWPORT, CORA, CTC, COLTON, DUNHILL, DAVIDOFF, FACKELMAN, WIN, NIBO, SAROME, CALOR GAS MATCH, UNILIGHT, K2, SUPERGAS, VENTTI, VECTOR.
This is by no way a complete list, and there is no promise this info will always be correct, manufactures can change recipes at anytime. This list is the brands that carry the ?Near Zero? impurity label, which means they are not supposed to have more than 15ppm of impurities, what they are is not know.
When you purchase the butane make sure you find the largest size of can you can. I use the 300ml/167g (6oz) cans of Colibri. Most places only carry the little 2oz cans, these are not enough. You will need at least 8oz of butane for every 1oz of plant material.
If you find a brand that?s not listed you can do the mirror test to check to see if it?s ok to use. See Below.
Take a mirror or piece of glass and spray some liquid butane into it. A good amount. (You may need some pliers to press the nozzle in) Wait about 5-10mins for the butane to evaporate and check the mirror for a white residue like the kind pictured. The residue also smells bad. Don?t confuse water condensation for residue. Also even Colibri leaves a very slight residue, but it doesn?t smell. Check for Smell.
(First mirror picture is of a clean mirror, second of the butane evaporating and last one is the white residue from Bernz-o-matic brand butane)
This is the most important factor if you wish to achieve high quality honey oil, Good fresh dried uncrushed bud makes the best honey oil, and you should easily achieve clear oil using uncrushed buds. Grind them up and do a second extraction to get a lower grade ?B? wash, not as tasty or clear like the first batch.
Butane extracts the smell from the plant material, so if you have some great smelling buds the oil will also take on that smell. If you use bad smelling or tasting plant material, you will get bad tasting oil.
Using crappy plant material can also result in low yield and oil dark in color.
Plant Material-|-Recommended amount Butane-|-Estimated Yield
1oz High quality bud-|-12oz-|-3-6g
1oz Average bud-|-10oz-|-2-4g
1oz low grade bud-|-9oz-|-2-3g
1oz high quality trim leaves-|-12oz-|-3-5g
1oz trim & leaves-|-10oz-|-2-4g
1oz fan leaves-|-8oz-|-1-2g
The extraction tube should be no wider than 1.5?, I find ¾? to be the best. The tube should be made of Stainless steel or Thick glass Only, You can use a copper tube if you cannot find stainless or glass, but only if you clean the tube well before each extraction. Copper tarnishes and the tarnish can potentially be extracted by the butane.
Avoid ALL Plastics, brass, steel and galvanized steel pipe, these all can contaminate your oil and make you sick.
I found a cheap stainless steel turkey baster works very well with little modification. It holds about 1/2oz of bud and can yield 2.5-3g of oil from ½ oz of good bud and 4-5oz of butane.
Some people like to build a contained extraction tube with valves to hold the butane in and let it sit in the plant material for a long time to maximize extraction but this is unnecessary. An open ended tube where the butane can flow through and drip into a collection dish is the easiest to build and makes much better oil. Allowing the butane to sit in the plant material will make your oil greener.
tire inflator pushes into drilled turkey basterI use a ¾? by 9? Stainless Turkey Baster tube with a screw cap top and a small hole for the butane nozzle. Use a drill to make a 7/64? hole. Leave the bottom Open Ended, a paper basket style coffee filter, and stainless steel screen or metal window screen will be attached here when the tube is filled with the plant material. Use a Hose Clamp to attach your filters.
For the collection dish I use a Pyrex casserole or pie dish. Avoid metal collection dish as they can spark, you can use them but I don?t recommend it.
Honey oil is very sticky and it?s a lot easier to scrape it up from a flat bottom dish with square sides or one with out corners but I have yet to find the perfect dish, Make sure your collection dish can hold at least 500ml of liquid.