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The upper limit of molecular weight for a substance to be absorbed transdermally is considered to be 500-600 g/mol. Fentanyl has a molecular weight of 336 g/mol
by TeaBrain 3y ago
The upper limit of molecular weight for a substance to be absorbed transdermally is considered to be 500-600 g/mol. Fentanyl has a molecular weight of 336 g/mol, which is plenty low enough to pass through the skin. It also happens to be commonly administered medically through transdermal patches.
- MilStdJunkie 3y agoI should re-phrase that, because like its aerosol military usage[1], yes, the right formulation passes skin tissue. Transdermals take hours or days, and the formulation is geared specifically so that it's carried fluid-to-fluid via fats in the skin layers. Fentanyl wholesale is never anywhere near pure form, and it's locked in crystal structures of other substances. When it's added to other crap, the concentration goes down even more. Should you roll around in giant piles of street grade fentanyl? No. Should you lick your fingers after arresting junkies? Ew, and also, no. Do you get chain overdosed from helping someone to an ambulance or being in the same room as a herd of junkies? Hard nope, but also, check your wallet. [1] Which sucks as "knockout gas", by the way. Real good at "killing the whole elementary school" though.