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Residual Solvent

Residual solvent commonly refers to the leftover solvents that are present in marijuana extracts after the processing is complete. This residual solvent occurs when the purging of the solvents isn’t done properly or if the steps aren’t followed completely. Residual solvents can sometimes be found in butane hash oil, Rick Simpson oil, budder, honeycomb, wax, crumbles, honey oils, and hash. In processing extracts, solvents are used to separate the THC from cannabis. Butane is known to be a popular substance that is used in the process to produce hash oil, wax, dabs, and shatter.

Extracting the most desirable properties of cannabis is the goal of using solvents, but not all of these methods are foolproof. Removing the maximal amount of residual solvent as possible is the goal, but there will always remain the risk of still having minuscule amounts left over. Residual solvents typically occur after the extraction or post-extraction phase, such as winterization, is complete.

Winterization refers to the soaking of cannabis in alcohol and then freezing it to isolate and separate the residual products. In the even that residual solvents cannot be entirely removed from the end product, then there is a risk that the consumer will inhale it during consumption. It is up for debate how harmful the effects are to the user and in what quantities that need to be consumed for harmful effects to occur.

Even though there is a risk of residual solvents in concentrates, they do hold the benefits of having a higher amount of cannabinoids in them. This means that the user can use a much smaller amount to get a greater effect than if they just used traditional cannabis.

Use of Term

I tried my absolute best to remove all of the residual solvent in the butane hash oil that I just produced.

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