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User:Mutinus/MEKP

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Mutinus/MEKP
Names
IUPAC names
butane-2,2-diyl dihydroperoxide (monomer)
2-hydroperoxy-2-((2-hydroperoxybutan-2-yl)peroxy)butane (dimer)
Other names
Methyl ethyl ketone peroxide, MEKP, MEK Peroxide
Identifiers
3D model (JSmol)
UNII
  • CCC(C)(OO)OO (monomer)
    CCC(C)(OO)OOC(C)(CC)OO (dimer)
Properties
C4H10O4 (monomer)
C8H18O6 (dimer)
Molar mass 122.12 g mol-1 (monomer)
210.22 g mol-1 (dimer)
Appearance Colorless, high-viscosity liquid
Density 1.170 g/mL
Melting point -8 °C
Boiling point 110-117.8 °C (decomposes)
Soluble
Vapor pressure <0.01 mmHg at 20 °C
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Strong Oxidizer, Explosive, Toxic
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
3
2
2
Flash point 82 °C
Explosive data
Shock sensitivity High
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Tracking categories (test):

Methyl ethyl ketone peroxide (MEKP) is an organic peroxide similar to acetone peroxide. MEKP is a colorless, oily liquid with an odor similar to that of acetone. MEKP is a strong oxidizer and a severe irritant. Pure MEKP is shock sensitive, and is therefore diluted for commercial and industrial use as a catalyst for the room temperature polymerization of polyester resins.

Commercially available MEKP is a mixture of two different forms: the monomer, C4H10O4, and the dimer, C8H18O6.[1] It may also exist as a cyclic dimer (with the formula C8H16O4), as well as higher cyclic oligomers.[2]

Production

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Methyl ethyl ketone peroxide is produced by the reaction between butanone and hydrogen peroxide. Temperature and the use of a catalyst such as nitric, sulfuric, or hydrochloric acid will affect the resulting yield of each oligomer.[1][3]

To prevent detonation, MEKP is diluted

Notes

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See also

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