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I have a can of spray for self-protection which has expired way back in 2008. It hasn't been used at all, and it doesn't seem a good idea to just throw it away without disabling it somehow first. I'm looking for ways to disarm it with minimum risk to myself and others. Obviously, I can just spray it away, but I'd rather not if I can avoid it.

The active ingredient is 2-chlorobenzalmalononitrile.

It's not water-soluble, but I was thinking of some combination of cooking oil and alkaline agent (baking soda, for example) to neutralize it. I'm still doing research on it, and I won't be doing anything rash just yet :-)

Any particular advice how to neutralize this spray?

If jurisdiction is somehow important, assume European Union.

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Do not open, do not try to neutralize it yourself! Bring it to Recycling center (DE: Wertstoffhof). If your city is 100k+ there should be one. That's the place where you bringing your old furniture, the rubbish after renovations, and so on. They have a part for disposal of hazardous waste (DE: Sondermüll). What usually comes in there are paints, old car batteries, old pesticides, etc.... Another possibility - if you have some friend at chemistry school of some local university, give it him. Each Chemistry faculty has some "disposal" facility.

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  • $\begingroup$ Good idea about Chemistry faculty, we have one in the university. I have to check with them if they can take care of this. $\endgroup$ – mindcorrosive Jun 24 '13 at 11:51

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