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Phthalic anhydride is the organic compound with the formula C 6 H 4 (CO) 2 O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially. This white solid is an important industrial chemical, especially for the large-scale ...
Toggle the table of contents. ... Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) ... Acetic Anhydride: 139.0 [6] Ethylene Dichloride: 1.25
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
Fm. Md. No. Legend. Values are in kelvin K and degrees Celsius °C, rounded. For the equivalent in degrees Fahrenheit °F, see: Boiling points of the elements (data page) Some values are predictions. Primordial From decay Synthetic Border shows natural occurrence of the element. s-block.
In organic chemistry, phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2 and structure HO(O)C−C 6 H 4 −C(O)OH. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. [ 4 ]
Phthalimide is the organic compound with the formula C 6 H 4 (CO) 2 NH. It is the imide derivative of phthalic anhydride. It is a sublimable white solid that is slightly soluble in water but more so upon addition of base. It is used as a precursor to other organic compounds as a masked source of ammonia. [2]
2 in the presence of vanadium pentoxide as catalyst gives phthalic anhydride: C 10 H 8 + 4.5 O 2 → C 6 H 4 (CO) 2 O + 2 CO 2 + 2 H 2 O. This reaction is the basis of the main use of naphthalene. Oxidation can also be effected using conventional stoichiometric chromate or permanganate reagents.
Phthalates are produced industrially by the acid catalysed reaction of phthalic anhydride with excess alcohol.The synthesis of diethyl phthalate is illustrative of this: . The properties of the phthalate can be varied by changing the alcohol, [12] allowing for an almost limitless range of products, although only around 30 are, or have been, commercially important.