Methyl ethyl ketone peroxide
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Template:Chembox image cellTemplate:Chembox AllOtherNamesTemplate:Chembox headerbarTemplate:Chembox IndexlistTemplate:Chembox JmolTemplate:Chembox ChEMBLTemplate:Chembox ECHATemplate:Chembox E numberTemplate:Chembox IUPHAR ligandTemplate:Chembox UNIITemplate:Chembox CompToxTemplate:Chembox headerbarTemplate:Chembox SolubilityInWaterTemplate:Chembox headerbarTemplate:Chembox HazardsTemplate:Chembox Datapage checkTemplate:Yesno| Template:Longitem | Template:Unbulleted list |
| Template:Longitem | 1759757 |
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| MeSH | Methyl+ethyl+ketone+peroxide |
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| RTECS number | Template:Unbulleted list |
| UN number | 3105 |
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| Template:Longitem | Template:Chembox Elements/molecular formula |
| Molar mass | Template:Chem molar mass |
| Appearance | Colorless liquid |
| Density | 1.170 g cm−3 |
| Boiling point | Template:Chembox CalcTemperatures |
| Shock sensitivity | High |
| Detonation velocity | 5200 m/s |
| RE factor | 0.9 |
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Methyl ethyl ketone peroxide (MEKP) is an organic peroxide with the formula [(CH3)(C2H5)C(O2H)]2O2. MEKP is a colorless oily liquid. It is widely used in vulcanization (crosslinking) of polymers.[2]
It is derived from the reaction of methyl ethyl ketone and hydrogen peroxide under acidic conditions. Several products result from this reaction including a cyclic dimer.[3] The linear dimer, the topic of this article, is the most prevalent.[4] and this is the form that is typically quoted in the commercially available material.[5]
Solutions of 30 to 40% MEKP are used in industry and by hobbyists as catalyst to initiate the crosslinking of unsaturated polyester resins used in fiberglass, and casting. For this application, MEKP often is dissolved in a phlegmatizer such as dimethyl phthalate, cyclohexane peroxide,Script error: No such module "Unsubst". or Template:Ill to reduce sensitivity to shock. Benzoyl peroxide can be used for the same purpose.Script error: No such module "Unsubst".
Safety
Whereas acetone peroxide is a white powder at STP, MEKP is slightly less sensitive to shock and temperature, and more stable in storage.
MEKP is a severe skin irritant and can cause progressive corrosive damage or blindness.
The volatile decomposition products of MEKP can contribute to the formation of vapor-phase explosions. Ensuring safe storage is important, and the maximum storage temperature should be limited to below 30 °C.[6]
Notes
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External links
- Template:Sister-inline
- CDC - NIOSH Pocket Guide to Chemical Hazards
- The Register: Mass murder in the skies: was the plot feasible?
- New York Times: Details Emerge in British Terror Case
- The Free Information Society: HMTD Synthesis Template:Webarchive
- How MEKP cures Unsaturated Polyester Resin (video animation)