Trioxane or occasionally trioxymethylene (C3H6O3) is a cyclic trimer (a ring of three molecules) of formaldehyde. 1,3,5-trioxane, when compressed into solid bars, is used by the military and outdoorsmen as a cooking fuel. The isomer 1,2,4-trioxane occurs naturally in some plants.
O
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H2C CH2
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O O
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CH2
