Maleic anhydride

Maleic anhydride Property

mp : 51-56 °C(lit.) bp : 200 °C(lit.) density : 1.48 vapor density : 3.4 (vs air) vapor pressure : 0.16 mm Hg ( 20 °C) Fp : 218 °F storage temp. : Store at RT. form : powder Water Solubility : 79 g/100 mL (25 ºC) Sensitive : Moisture Sensitive Merck : 14,5704 BRN : 106909 Stability:: Stable. Combustible. Incompatible with water, strong oxidizing agents, alkali metals, strong bases, amines, most common metals, polymerization catalysts and accelerators. CAS DataBase Reference: 108-31-6(CAS DataBase Reference) NIST Chemistry Reference: 2,5-Furandione(108-31-6) EPA Substance Registry System: 2,5-Furandione(108-31-6)

Safety

Hazard Codes : C Risk Statements : 22-34-42/43 Safety Statements : 22-26-36/37/39-45 RIDADR : UN 2215 8/PG 3 WGK Germany : 1 RTECS : ON3675000 F : 21 HazardClass : 8 PackingGroup : III Hazardous Substances Data: 108-31-6(Hazardous Substances Data)

Maleic anhydride Chemical Properties,Usage,Production

Chemical Properties White solid Usage Maleic Anhydride is heterocyclic compound used in the manufacture of unsaturated polyester resins. Maleic Anhydride has a wide range of other applications; it is used in synthetic tensides, insecticides, herbicides and fungicides. General Description Colorless crystalline needles, flakes, pellets, rods, briquettes, lumps or a fused mass. Melts at 113°F. Shipped both as a solid and in the molten state. Vapors, fumes and dusts strong irritate the eyes, skin and mucous membranes. Flash point 218°F. Autoignition temperature 890°F. Used to make paints and plastics and other chemicals. Air & Water Reactions Soluble in water. Reacts slowly with water to form maleic acid and heat. Reactivity Profile Maleic anhydride react vigorously on contact with oxidizing materials. Reacts exothermically with water or steam. Undergoes violent exothermic decomposition reactions, producing carbon dioxide, in the presence of strong bases (sodium hydroxide, potassium hydroxide, calcium hydroxide), alkali metals (lithium, sodium, potassium), aliphatic amines (dimethylamine, trimethylamine), aromatic amines (pyridine, quinoline) at temperatures above 150° C [Vogler, C. A. et al., J. Chem. Eng. Data, 1963, 8, p. 620]. A 0.1% solution of pyridine (or other tertiary amine) in Maleic anhydride at 185°C gives an exothermic decomposition with rapid evolution of gas [Chem Eng. News 42(8); 41 1964]. Maleic anhydride is known as an excellent dienophile in the Diels-Alder reaction to produce phthalate ester derivatives. These reactions can be extremely violent, as in the case of 1-methylsilacyclopentadiene [J. Organomet., Chem., 1979, 179, c19]. Maleic anhydride undergoes a potentially explosive exothermic Diels-Alder reaction with 1-methylsilacyclopenta-2,4-diene at 150C [Barton, T. J., J. Organomet. Chem., 1979, 179, C19], and is considered an excellent dieneophile for Diels-alder reactions [Felthouse, Timothy R. et al. "Maleic anhydride , Maleic Acid, and Fumaric Acid." Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. 2005]. Health Hazard Inhalation causes coughing, sneezing, throat irritation. Skin contact causes irritation and redness. Vapors cause severe eye irritation; photophobia and double vision may occur. Fire Hazard Behavior in Fire: When heated above 300°F in the presence of various materials may generate heat and carbon dioxide. Will explode if confined.

Maleic anhydride Preparation Products And Raw materials

Raw materials Xylene Liquefied petroleum ges N-BUTANE Benzene 1-Pentanol

Preparation Products emulsion waterproof agent FUMARONITRILE tou-ming oil 3-HYDROXY-1-PHENYL-6-PYRIDAZONE Disodium succinate hexahydrate Water-soluble resin maleic acid-vinyl acetate copolymer synthetic tanning agent DLT-14 Carbic anhydride Pyridaphenthion EXO-3,6-EPOXY-1,2,3,6-TETRAHYDROPHTHALIC ANHYDRIDE Bismaleimide DIALLYL MALEATE DODECENYLSUCCINIC ANHYDRIDE Acipimox Dispersing rosin latex Water soluble epoxy resin DL-Asparagine monohydrate PR-I retanning agent DL-Malic acid Tetrahydro-4,7-epoxyisobenzofuran-1,3-dione Dioctyl maleate N-Ethylmaleimide Di-(2-Ethylhexyl)4,5-Epoxytetrahydrophthalate antistatic finish agent for synthetic fiber Dibutyltin maleate SULFACHLOROPYRIDAZINE Sizing agent for paper making 4-MALEIMIDOBUTYRIC ACID maleic anhydride-benzylethylene sulfonated acid copolyer neutral size-ASA maleic anhydride-arcylic acid copolymer 3-BENZOYLACRYLIC ACID disodium 4-[2-[(1-oxoundec-10-enyl)amino]ethyl] 2-sulphonatosuccinate Dioctyl(maleate)tin PYRIDAZINE-3,6-DIOL synthetic tanning agent KS-1 Methyl tetrahydrophthalic anhydride Dibutyl maleate Chrysene

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