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Also known as: butane hash oil · BHO extraction · butane extraction

BHO Basics (With Safety)

What butane hash oil is, the products made from it, why it is made only in licensed labs, and what consumers should check.

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Growing, buying or possessing cannabis and seeds is legal only in some places. Check the law where you live before acting on this information.

↯ The honest take

Butane hash oil is behind many of the most potent products on dispensary shelves — shatter, wax, budder, live resin. It is also the cannabis process most likely to put someone in a burn unit when attempted outside a licensed lab. As a consumer, the useful questions are not how it is made but whether your product was made by a licensed producer and passed residual-solvent testing.

What BHO is

Butane hash oil (BHO) is a cannabis concentrate made by dissolving cannabinoids and terpenes out of plant material with liquid butane, sometimes blended with propane, and then removing the solvent [1] Strong evidence. Hydrocarbon solvents are selective for cannabinoids and terpenes, which is why BHO products are very potent and aromatic. Weedpedia describes solvent extraction at overview level only and does not give production instructions.

The products

The same extract is finished into different textures: glassy shatter, soft wax and budder, crumbly crumble, and live resin made from fresh-frozen plants. Sauce and diamonds are produced when THCA crystallises out of the extract (see THCA crystallization). Texture says little about quality; the lab report does.

Why it is made only in licensed labs

Butane is a pressurised, flammable gas that is heavier than air and ignites easily. Regulators therefore allow hydrocarbon extraction only in licensed facilities using certified closed-loop equipment, rooms rated for flammable gases, gas detection and fire-code inspections [1]. Burn centres in Colorado and California have reported serious BHO burns, rising as cannabis was liberalised [2][3] Strong evidence. See BHO safety warnings for the injury data.

The law

Many US states and other countries make it a separate offence to manufacture concentrates with flammable solvents, even where cannabis possession is legal; Colorado's statute targets manufacture using an "inherently hazardous substance" [4] Strong evidence. Check local law before processing cannabis in any way.

What consumers should check

Safer ways to get concentrates

Sources

  1. Peer-reviewed Lazarjani, M. P., Young, O., Kebede, L., & Seyfoddin, A. (2021). Processing and extraction methods of medicinal cannabis: a narrative review. Journal of Cannabis Research, 3, 32.
  2. Peer-reviewed Bell, C., Slim, J., Flaten, H. K., Lindberg, G., Arek, W., & Monte, A. A. (2015). Butane hash oil burns associated with marijuana liberalization in Colorado. Journal of Medical Toxicology, 11(4), 422–425.
  3. Peer-reviewed Romanowski, K. S., Barsun, A., Kwan, P., et al. (2017). Butane hash oil burns: a 7-year perspective on a growing problem. Journal of Burn Care & Research, 38(1), e165–e171.
  4. Government Colorado Revised Statutes § 18-18-406.6 — Unlawful manufacture of marijuana concentrate using an inherently hazardous substance. Colorado General Assembly.

How this page was made

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Oct 30, 2026
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Oct 30, 2026
Fact-check pass — raised 8 flags
Oct 30, 2026
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Oct 30, 2026
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May 11, 2026
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May 11, 2026
Initial draft

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