Bedlasky
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MEK peroxide or not?
Hi.
I opened yesterday jar with MEK and saw some white crust on the lid. Lid was was covered before with some thin plastic film inside, so I think that
the crust is just plastic destroyed by ketone. But I am not sure and think that this also may be peroxide. Is it possible or it is nonsense?
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macckone
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It is possible and if it is then it is dangerous.
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Bedlasky
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Thanks. I opened the jar, put in to the lid some acetone, ammonium ferrous sulfate and little bit of HCl. In to MEK I added some ammonium ferrous
sulfate and little bit of HCl. Ammonium ferrous sulfate make nice green solution, no signs of rusty Fe(III). And that solid in the lid looks like
wierd goo. When I carefully mixed ferrous salt in the lid and I very easily scraped off some plastic during mixing and see metal underneath it. So it
seems that white solid is just plastic.
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macckone
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plastic is much better than organic peroxide.
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Bedlasky
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Yeah it is  .
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