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by pcthrowaway
1111 days ago
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> I had heard that there's a community of people who insufflate caffeine on Reddit I'm curious if it even absorbs well via the sinuses. From experience with powdered caffeine (mixing with shampoo as a folk treatment for hair loss), it doesn't readily dissolve at room temperature water, though of course it dissolves just fine in hot water, which is why the standard quick extraction from coffee beans involves hot water (cold brew by contrast, involves long periods of steeping for a result that still has less caffeine) |
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Chemists have wonderful words to quantify the exact degree of solubility under various conditions: "sparingly soluble" means it generally takes 30-100ml of solvent to dissolve 1g of the material in question.
So, if you're hip to the quantity of caffeine in your beans (by, perhaps, grinding and boiling 100g and then analytically extracting the mass of relatively pure caffeine with something like DCM, followed by recrystallization in water maybe), you can figure out how much caffeine will be present in your cold brew based on the quantity of solvent.