Accidental Byproduct
Acetone peroxide can also occur accidentally, when suitable chemicals are mixed, for example when methyl ethyl ketone peroxide is mixed with acetone while making fiberglass composites, and left to stand for some time, or when a mixture of peroxide and hydrochloric acid from printed circuit board etching is mixed with waste acetone from cleaning the finished board and allowed to stand. While amounts obtained this way are typically much smaller than from intentional production, they are also less pure and prepared without cooling, and hence very unstable.
It is also a hazardous by-product of isosafrole oxidation in acetone, a step in the synthesis of MDMA.
Read more about this topic: Acetone Peroxide
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