(-)-Δ9-THC Stabilization with Acidic Solvents
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Solution Overview
Problem
Pure (−)-Δ9-trans-tetrahydrocannabinol is unstable and prone to degradation when stored, even when dissolved in solvents, leading to the formation of less potent Δ8-tetrahydrocannabinol and cannabinol, requiring refrigeration to prevent degradation.
Innovation Solution
A composition comprising a tetrahydrocannabinol compound, a solvent such as sesame oil or C1-C4 alcohols, and an acid like citric acid, which stabilizes the compound and reduces degradation during storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If (−)-Δ9-trans-tetrahydrocannabinol is stored as a pure compound or dissolved in solvent, then it can be used therapeutically, but it degrades to form cannabinol and Δ8-tetrahydrocannabinol which are less potent or inactive
Solution Approach 1:
The patent introduces an intermediary substance (antioxidant, chelating agent, or buffer) that mediates between the (−)-Δ9-trans-tetrahydrocannabinol and the degrading factors (oxygen, moisture, pH changes). This intermediary prevents direct degradation by neutralizing reactive species or maintaining stable chemical conditions, thereby preserving the potency and integrity of the active compound during storage.
Solution Approach 2:
The patent employs parameter changes by adjusting storage conditions (temperature, pH, oxygen exposure) and adding stabilizing agents to alter the chemical environment. These parameter changes shift the system from a state prone to degradation to a state where (−)-Δ9-trans-tetrahydrocannabinol remains stable, preventing formation of less potent degradation products.
2Reliability
If (−)-Δ9-trans-tetrahydrocannabinol is stored under refrigerated conditions, then degradation is prevented, but storage and distribution become more complex and costly
Solution Approach 1:
The patent introduces chemical intermediaries (stabilizing agents such as antioxidants, chelating agents, or buffers) that act as mediators between the (−)-Δ9-trans-tetrahydrocannabinol and environmental degradation factors. These intermediaries create a protective chemical environment that allows the compound to remain stable at ambient temperatures, eliminating the need for refrigerated storage infrastructure.
Solution Approach 2:
The patent applies parameter changes by modifying the chemical composition of the storage system through addition of stabilizing agents. This changes the stability parameters of the system, allowing (−)-Δ9-trans-tetrahydrocannabinol to maintain its potency under ambient storage conditions rather than requiring controlled cold chain logistics.
Data Source
AI summary
A composition comprising a tetrahydrocannabinol compound, a solvent and an acid, wherein the tetrahydrocannabinol compound may be Δ8 tetrahydrocannabinol, (−)-Δ9-trans-tetrahydrocannabinol or a side chain alkyl derivative of either compound, the solvent may be an oil or C1-C4 alcohol (e.g. sesame oil or ethanol), and the acid may be an organic acid or a mineral acid.