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Replying to @Pinboard @Comparativist
Why you say it gets weaker? From what I understand (I did not verify but it sounds plausible) in the expired one the “mixture” separates into single components which are more toxic than the mixture
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Ok. Answer this question.... has anyone seen a list of ingredients for one of these CS projectiles? Because, unless you have, speculating on the effects of ageing of said projectiles is likely a foolhardy endeavour
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Potassium cyanide is a solid. How would you monitor that in gas or vapour form? It’s an insane claim
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I think the claim is that the meter is measuring HCN, and the caption writer (and possibly translator) got confused. The more general context is a widespread belief in Hong Kong that CS canisters past their expiration date are somehow more toxic; this is meant to be "proof"
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Can someone explain to me the toxicology by which CS past a nominal date increases in toxicity? Can anyone explain how that is expected to work?
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Replying to @DanKaszeta @Pinboard and
Can someone explain to me how to correlate a figure from an (alleged) HCN detector to CS toxicity?
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I would turn it aroun this way—you're dealing with folk chemistry and rumors spread by young HK protesters on online forums. Can you state authoritatively in a way we can point them to that CS doesn't decompose into some kind of deadly poison when it sits on a shelf for years?
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It will be helpful to have something to point them to. Hong Kong street protests are a high-stress, low-trust environment and this is one of a number of rumors that have spread and are proving impossible to debunk
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I've seen really stupid arguments like vinegar and liquid nitrogen and such.
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