METHYL ETHYL KETONE (MEK) Chemical compatibility with O-rings, rubbers, & plastics

Methyl ethyl ketone, often called MEK or 2-butanone with the formula C4H8O, is a colorless, fast evaporating solvent widely used in coatings, adhesives, inks, and industrial cleaning formulations. It is also used as a chemical intermediate in organic manufacturing processes. Due to its strong solvency, compatibility with O-rings, rubber seals, gaskets, and plastic components should be evaluated to prevent swelling or degradation. MEK is highly flammable and may cause skin and respiratory irritation, so proper storage, ventilation, safe handling procedures, and appropriate PPE are recommended.

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