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THC phosphate ester is a water soluble derivative of THC, invented in 1978 in an attempt to get around the poor water solubility of THC and make it easier to inject for the purposes of animal research into its pharmacology and mechanism of action. The main disadvantage of THC phosphate ester is the slow rate of hydrolysis of the ester link, resulting in delayed onset of action and lower potency than the parent drug.
Additional recommended knowledge
THC phosphate ester is made by reacting THC with phosphoryl chloride using pyridine as a solvent, following by quenching with water to produce THC phosphate ester. In the original research the less active but more stable isomer Δ8THC was used, but the same reaction scheme could be used to make the phosphate ester of the more active isomer Δ9THC. 
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "THC-O-phosphate". A list of authors is available in Wikipedia.|