Melting point :110°C
Boiling point :284 °C
Density :1.053 g/mL at 20 °C(lit.)
vapor pressure :0.644-73.6Pa at 25℃
refractive index :n20/D 1.455
Flash point :190 °F
storage temp. :2-8°C
form :Liquid
Water Solubility :0.1-0.5 g/100 mL at 22 ºC
BRN :1759757
Exposure limits :ACGIH (1986) recommends a ceiling limit of 1.5 mg/m³ (0.2 ppm). This concentration in air is based on its irritant properties.
Stability :May react violently or explode if heated. Reacts violently with combustibles and organic material. Incompatible with flammables, strong oxidizing agents, strong reducing agents, promoters such as Cobalt compounds, brass, mild steel, aluminum alloys, natural and synthetic rubbers and chemical accelerators, heavy metals, acids and bases.
LogP :0.3 at 25℃
CAS DataBase Reference :1338-23-4(CAS DataBase Reference)
EPA Substance Registry System :Methyl ethyl ketone peroxide (1338-23-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H242 Heating may cause a fire Self-reactive substances and mixtures; and Organic peroxides Type C, D,Type E, F Type G Danger Warning P210, P220, P234, P280, P370+P378,P403+P235, P411, P420, P501 H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P220 Keep/Store away from clothing/…/combustible materials. P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P310 Immediately call a POISON CENTER or doctor/physician. P403+P235 Store in a well-ventilated place. Keep cool. P410 Protect from sunlight.