Methyl ethyl ketone peroxide
- 2-Butanone peroxide
- Ethyl methyl ketone peroxide
- Methyl ethyl ketone hydroperoxide
Manufacture of acrylic resins, hardening agent for fiberglass-reinforced plastics.
Registry Numbers and Inventories.
Tumorigen; Human Data; Primary Irritant
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Decomposition point, °C
Vapor density (air=1)
1.170 g/cm3 (20 C)
Solubility in water
Hazards and Protection.
Storage temperature- -18 to 29 C. Separate storage away from flammables, strong oxidizing and reducing agents, in particular, promoters such as cobalt compounds. Never store in refrigerators containing food and drink. Store at only in original containers. Do not return material to original containers. Post no smoking and flammable storage to keep fires away signs.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate clothing to prevent any reasonable probability of skin contact. Wear eye protection to prevent any possibility of eye contact.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep material out of water sources and sewers. Apply water spray or mist to knock down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Remove trapped material with suction hoses.
Self-accelerating decomposition temperature of 40% dimethyl phthalate solution, 63 C. Explosive decomposition at 110 C. Shock and heat sensitive. Dangerous when exposed to heat and flames. MEK peroxide can exist in several different structures, some of which are extremely shock sensitive even at 60% concentration. MEK peroxide can be decomposed by heat and sunlight and many chemicals. Spontaneous chemical reaction, ignition, and/or explosion may occur if mixed with readily oxidizable, organic, or flammable materials or chemical accelerants. container may explode in heat of fire. May explode from heat or contamination. Solutions containing up to 60% peroxide may explode from friction or shock. Runoff to sewer may create fire or explosion hazard.
Sensitive to sunlight If mixed with readily oxidizable materials Reacts with combustible materials such as wood, cloth or organic materials, with chlorine, and with metals (iron, copper and their alloys and aluminum and its alloys) Incompatible with strong oxidizing agents, strong reducing agents, natural rubbers, synthetic rubbers and chemical accelerators Incompatible with heavy metals, acids and bases.
Oxides of carbon.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Keep run-off water out of sewers and water sources.
Moderately flammable. Organic peroxides are highly flammable and easily ignited. Fires involving them may be large, rapidly burning, fast moving, and punctuated frequently by explosions.
Fire may produce irritating, corrosive and/or toxic gases.
NIOSH REL: C 0.2 ppm (1.5 mg/m3)
Coma occurred 30 minutes after ingestion of mekp in one case.
Burns of the esophagus and less commonly the stomach may occur after caustic ingestion; the absence of oral mucosal injury does not reliably exclude esophageal burns. Patients with stridor, drooling or vomiting are more likely to have esophageal burns.
Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.
Severe skin irritation and/or burns may occur.
Ingestion may result in burns to the lips, tongue, oral mucosa, and upper airway. Alkaline eye exposures produce distortion of cellular membranes, loss of corneal, the mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeballl and lens epithelium and loss of endothelium of the cornea and blood vessels.
DO NOT INDUCE VOMITING. Corrosive chemicals will destroy the membranes of the mouth, throat, and esophagus and, in addition, have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. Transport the victim IMMEDIATELY to a hospital.
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
USCG CHRIS Code
Std. Transport #