Although this refers to bud, I supposed that hash would be the same/similar, especially as creating the hash essentially breaks the THC crystal.
Cannabis quality and potency change over time. In the living plant, the precursors of THC and CBD are found in their acid forms, THCa and CBDa. These are not psychotropic. Only when they lose a portion of their molecules do they become active as THC and CBD. This occurs naturally over time and is accelerated in the presence of heat and light, especially ultraviolet light.
Once buds are dried and cured, potency is at its peak. Over time THC gradually degrades to CBN, a far less psychotropic cannabinoid than THC.
Research conducted at the University of Mississippi on low-quality cannabis stored for four years at room temperature (68-72° [20-22° C]) found that the percentage loss of THC was proportional to time in storage, with the greatest loss in the first year. As the THC level declines, the concentration of CBN increases.
This research is consistent with the experiences of marijuana users. Marijuana loses potency over time as the psychoactive THC converts to CBN, which induces sleep but not highness. Storing buds in the freezer or refrigerator slows deterioration. Freezing keeps buds fresh longest.
However, even in deep freeze THC deteriorates, at nearly 4% a year. In deep freeze (below 0°F) deterioration slows further. At refrigerator temperatures THC deteriorates at the rate of about 5.4% a year. A freezer is best for long-term storage; a refrigerator is good for protecting terpenes in the short term.
Discover how heat and light, especially UV light, evaporate terpenes and erode quality and learn about the proper materials to use for storing your cannabis.
www.edrosenthal.com
