Curious About Cannabis CRC Extracts

By Terry Hacienda, The Fresh Toast on

Published in Cannabis Daily

If you are new or new”ish” to cannabis, it can be a fun adventure with lots of thing – like what is CRC?

Cannabis is legal in some form in 40 states and the DEA has been advised to reschedule it. It has become more mainstream as the majority of the population believe it should be legal.  Smoking, long the most popular way to consume has given away to vaping and edibles.  Like alcohol, there are dozens of way to enjoy it – and one is CRC.

CRC (color remediation column) is a type of cannabis extract that is made using a process called “column chromatography.” It was initially started to remove dark colored substances left over from low-quality extraction, which signaled to the consumer its low grade.

The process makes the extract appear lighter, as lighter color extracts are associated with high quality. The idea was to enhance the visual aesthetic of a cannabis extract so it would sell better.

CRC has started to become a mainstream practice used by legal and illicit manufacturers to enhance the appearance of cannabis extracts. CRC has evolved and is now used to remove pesticides, unpleasant flavors, and other wanted byproducts.

CRC is most commonly used with butane hash oil. The color of low-grade hash oil changes from nearly “black, or dark brown, to light gold, or even white” when it undergoes CRC.


What is CRC extraction?

CRC extraction is a post-extraction process that uses technology to enhance the appearance of cannabis extracts and concentrates.

Column chromatography works by using a column (often a steel cylinder) and packing it with a filtration medium. Common filtration mediums include: Activated bleaching earth (used to remove colors)Activated carbon/charcoal (paired with activated silica gel to withdraw chlorophyll)Activated silica gel (used to remove very dark colors from an extract)Bentonite clay (used to remove colors and impurities)Diatomaceous earth (helps to create a fine filtration process)Magnesol (used to remove colors and impurities)Sand (used to remove impurities)T5 clay (remove colors and impurities) The cannabis concentrate is then pushed through filtering mediums that result in the removal of color-impacting pollutants and other impurities. Pollutants and impurities that can be removed (depending on the filtration medium) include: ChlorophyllCaroteneLipidsLycopenePheophytinsXanthophyll One of the downsides of CRC is that it will also strip a concentrate of its terpene content. A way to tell if an extract or concentrate has undergone CRC is the smell. It may smell of chemicals, or may smell excessively fruity or earthy, indicating that it may have had terpene infused to attempt to restore the original flavor profile.

Is CRC wax bad for you?


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