MEKP

MEKP, short for methyl ethyl ketone peroxide, is an organic peroxide used as a free-radical initiator to cure unsaturated polyester and vinyl ester resins. It is commonly supplied as a stabilized solution, often in methyl ethyl ketone or isopropanol, and may contain inhibitors to limit premature decomposition. In resin systems, MEKP decomposes in the presence of heat or a metal catalyst, generating free radicals that initiate polymerization and curing of the resin, a process widely used in fiberglass, boat building, automotive repair, and related applications.

Chemical properties and hazards: MEKP is highly reactive and can be shock-sensitive and explosive under certain conditions, especially when concentrated or contaminated. It acts as a strong oxidizer and can ignite or propagate fires in contact with fuels, organic materials, or incompatible substances. It is corrosive to skin, eyes, and mucous membranes, and vapors can irritate the respiratory tract. MEKP is incompatible with reducing agents, strong acids or bases, certain metals, and contaminants that may trigger rapid decomposition.

Handling and storage: MEKP must be stored in tightly closed, clearly labeled containers in a cool, well-ventilated area away from heat, sources of ignition, and incompatibles. Storage and transport are regulated in many jurisdictions as organic peroxides, with requirements for approved packaging, labeling, and handling. Spill or leak response requires non-sparking tools, proper absorbents, and disposal as hazardous waste. Personal protective equipment should include chemical-resistant gloves, goggles or face shield, and appropriate protective clothing.

Safety considerations: Use in well-ventilated spaces or fume hoods; minimize skin and eye contact; have emergency procedures in place for exposure or fire, and follow all applicable regulations and industry guidelines.