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phthalic anhydride basic information |
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phthalic anhydride chemical properties |
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mp |
131-134 °c(lit.) |
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bp |
284 °c(lit.) |
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density |
1,53 g/cm3 |
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vapor density |
5.1 (vs air) |
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vapor pressure |
<0.01 mm hg ( 20 °c) |
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fp |
152 °c |
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storage temp. |
store at rt. |
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water solubility |
6 g/l (20 ºc) |
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sensitive |
moisture sensitive |
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merck |
14,7372 |
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brn |
118515 |
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stability: |
stable. combustible. incompatible with strong oxidizing agents, strong bases, moisture, strong acids. dust may form an explosive mixture with air. |
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cas database reference |
85-44-9(cas database reference) |
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nist chemistry reference |
phthalic anhydride(85-44-9) |
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epa substance registry system |
1,3-isobenzofurandione(85-44-9) |
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phthalic anhydride usage and synthesis |
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chemical properties |
white crystalline solid with choking odour |
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usage |
phthalic anhydride is an organic compound and the anhydride of phthalic acid (p384480). phthalic anhydride is an important industrial chemical commonly used in large-scale production of plasticizers f or plastics. recent research have also evaluated phthalic anhydride as potential antibacterial agent. |
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general description |
a colorless to white lustrous solid in the form of needles with a mild distinctive odor. moderately toxic by inhalation or ingestion and a skin irritant. melting point 64°f flash point 305°f. forms a corrosive solution when mixed with water. used in the manufacture of materials such as artificial resins. |
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air & water reactions |
reacts, usually slowly with water to form phthalic acid and heat [merck 11th ed. 1989]. the phthalic acid is somewhat soluble in water. |
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reactivity profile |
phthalic anhydride reacts exothermically with water. the reactions are sometimes slow, but can become violent when local heating accelerates their rate. acids accelerate the reaction with water. incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. undergoes exothmeric nitration with fuming nitric acid-sulfuric acid and may give mixtures of the potentially explosive phthaloyl nitrates or nitrites or their nitro derivatives [chem. & ind. 20:790. 1972]. phthalic anhydride reacts violently with cuo at elevated temperatures [park, chang-man, richard j. sheehan. hthalic acids and other benzenepolycarboxylic acids kirk-othmer encyclopedia of chemical technology. john wiley & sons, inc. 2005]. mixtures of phthalic anhydride and anhydrous co2 explode violently if heated [eaflet no. 5, inst. of chem., london, 1940]. |
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health hazard |
solid irritates skin and eyes, causing coughing and sneezing. liquid causes severe thermal burns. |
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fire hazard |
combustible material: may burn but does not ignite readily. substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. when heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. most vapors are heavier than air. they will spread along ground and collect in low or confined areas (sewers, basements, tanks). vapors may travel to source of ignition and flash back. contact with metals may evolve flammable hydrogen gas. containers may explode when heated or if contaminated with water. |
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phthalic anhydride preparation products and raw materials |
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preparation products |
2,3,4,5-tetrafluorobenzoic acid-->2-methyl anthraquinone-->2-bibenzylcarboxylic acid-->2-benzoylbenzoic acid-->diphenyl phthalate-->1,2,5-oxadiazole-3-carboxylic acid-->cyclooctene-->fluorescein-->di-n-octyl phthalate-->dicapryl phthalate-->3-methyl-1,2,5-oxadiazole-->amino resin varnish-->indobufen-->folpet-->didecyl phthalate-->2',7'-dibromo-3',6'-dihydroxyspiro[isobenzofuran-1(3h),9'-[9h]xanthene]-3-one -->diallyl phthalate-->alkyd resin insulating paint-->n-(hydroxymethyl)phthalimide-->2-(morpholine-4-carbonyl)-benzoic acid-->n-(2-bromoethyl)phthalimide-->2,3-dihydro-2-phenyl-1h-isoindol-1-oxo-isoindoline-->di-iso-decyl phthalate-->diisobutyl phthalate-->2-ethyl anthraquinone-->2-chloroanthraquinone-->5-(2-carboxybenzoyl)-2-chlorobenzenesulfonyl chloride-->di-n-pentyl phthalate-d4-->dicyclohexyl phthalate-->benzalphthalide-->c.i. 564100-->2-benzoylbenzoyl chloride-->n-phenylphthalimide-->diisononyl phthalate-->1-chloro-4-methoxyphthalazine-->potassium hydrogen phthalate-->n-phthaloyl-dl-glutamic anhydride 98-->solvent red 49-->dinonyl phthalate-->diisooctyl phthalate |
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raw materials |
benzene-->maleic anhydride -->naphthalene-->1,2-dimethylbenzene-->vanadium pentoxide -->motor benzol-->lubricating oil-->technical naphthalene-->storage sump |
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