MCR Labs Researchers Obtain Crystalline Structure of THCA-A

WALTHAM, Mass. – Researchers from Brandeis University, MCR laboratories, and Skell Labs have determined the crystal framework of Δ9-tetrahydrocannabinolic acid A (THCA-A) for the time that is first a discovery that paves the way for further research on the cannabinoid as well as the more well-known product derived from its decarboxylation, Δ9-tetrahydrocannabinol (THC).

As the precursor to the primary psychoactive cannabinoid THC, THCA-A has been of interest to researchers for some time. Studies of the compound that is pure been restricted because of problems both in purification and crystallization. Both dilemmas had been fixed by utilizing a carefully-designed extraction that is selective fractionation process with liquid carbon dioxide. Unfortunately, THCA-A also appears to be difficult to stabilize, which has been a roadblock to study that is further medical research in the cannabinoid.


Chemical security is an important section of research during medication development within the industry that is pharmaceutical as different forms of crystalline drugs will affect how the body absorbs that drug. If there are two forms of a solid drug, one may be so insoluble that it has no beneficial effect, while another more soluble form could offer an bio-delivery option that is ideal. Item storage space is likewise an issue whenever up against unstable substances.

All chemical substances, such as for example cannabinoids, are susceptible to degradation, whether it does occur obviously in the long run, or perhaps is instigated by temperature, light, or an interaction with another ingredient. This degradation usually causes a loss in strength, adversely impacts the efficacy that is product’s and introduces potentially unwanted byproducts.

Obtaining the pure crystalline form of a compound, such as THCA-A, gives researchers a clear look at the structure of the compound and opens avenues to solve stability issues. During the process, researchers noted that each molecule within the structure had an hydrogen that is intramolecular and that pairs of particles had been linked by intermolecular hydrogen bonds.

“The hydrogen relationship pattern could possibly be an key that is important unlocking alternative approaches to the stability issues that have been observed for THCA-A,” said Dr. Bruce Foxman, Professor Emeritus of Chemistry at Brandeis University. “THCA-A could be a form that is useful the storage space and manufacturing of THC, because the ingredient decarboxylates reasonably cleanly to the item THC with reduced part reactions.”

Knowledge regarding the hydrogen relationship pattern may also be ideal for further research on polymorphs or co-crystals, that might have various plans and therefore might impact the compound’s decarboxylation behavior.

Skell, J. M., Kahn, M. & Foxman, B. M. acid that is δ9-Tetra­hydro­cannabinolic, the precursor to Δ9-tetra­hydro­cannabinol (THC)Acta Cryst. (2021). C77, 84-89,

About MCR Labs
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