What chemical warfare substance is yellow dust that hisses when the container is opened and will foam when it comes into contact with moisture? | Poal: Say what you want.

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What chemical warfare substance is yellow dust that hisses when the container is opened and will foam when it comes into contact with moisture?

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[–] • 1 pt

(edited )

I am guessing from the color it is mustard gas?

https://youtu.be/yOZNL7Uynsk

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