Methyl ethyl ketone peroxide
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| Preferred IUPAC name
| Systematic IUPAC name
| Other names
|Molar mass||210.23 g/mol|
|Density||1.170 g/cm3 (at 20 °C)|
|Melting point||−30 °C (−22 °F; 243 K) |
|Boiling point||70 °C (158 °F; 343 K) (decomposes above 80 °C)|
|Solubility||Miscible with acetone, ethanol|
|Vapor pressure||<0.01 mm Hg at 20 °C|
|Safety data sheet||Sigma-Aldrich (≤ 50%)|
|Flash point||75 °C (167 °F; 348 K)|
| Acetone peroxide|
Hexamethylene triperoxide diamine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Methyl ethyl ketone peroxide or MEKP is colorless liquid chemical compound, used mainly as a catalyst in various plastic materials. However, it is also an explosive material, and due to its use in terrorist bombing, it has gained a bad reputation, mainly because it's easy to manufacture from OTC products and somewhat difficult to properly detect.
MEKP can be used as a catalyst in various polyester resins.
MEKP is an oily colorless liquid, with a faint acetone-like smell (some sources say mint), slightly soluble in water, but miscible with various organic solvents.
Methyl ethyl ketone peroxide is a primary explosive, sensitive to shock and friction, though less so than TATP, with a detonation velocity of 5200 m/s.
MEKP is only available commercially in solution as polymer catalyst. Most solutions consist of 55-60% dimethyl phtalate, 30-35 methyl ethyl ketone peroxide and <5% hydrogen peroxide. However, extracting it from the commercial solution may not worth the effort.
- Crosslink polymer catalyst
MEKP is a strong irritant and harmful if ingested.
It is also a sensitive explosive.
Diluted solutions should be stored in closed bottles, away from light.
While more stable than other organic peroxides, concentrated MEKP should not be stored for long periods of time.
MEKP can be neutralized with a reducing agent, such as sodium sulfite. If no more peroxides are present in the neutralization product, it can be safely burned or disposed properly.
- Gerhartz, W. (exec ed.). Ullmann's Encyclopedia of Industrial Chemistry. 5th ed.Vol A1: Deerfield Beach, FL: VCH Publishers, 1985 to Present., p. VA4 (85) 476
- layton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene and Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New York, NY: John Wiley & Sons Inc., 1993-1994., p. 562