Containing no other elements (e.g., hydrogen) besides carbon and oxygen, mellitic anhydride is an oxide of carbon , and, along with CO 2, CO, and C 3 O 2, is one of the only four that are reasonably stable under standard conditions. Mellitic acid may be prepared by warming mellite with ammonium carbonate, boiling off the excess of the ammonium salt, and adding ammonia to the solution. Long digestion of the acid with an excess of phosphorus pentachloride forms the acid chloride, which crystallizes in needles, and melts at 190 °C. We investigated the directions of Maumené‐Lecuir, for preparing the potassium salt of mellitic acid by thermal decomposition of the potassium salt of tartaric acid; we obtained only very low yields of mellitic acid by this method. This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. MDL number MFCD00002469. Working off-campus? Preparation. InChI=1S/C12H6O12/c13-7(14)1-2(8(15)16)4(10(19)20)6(12(23)24)5(11(21)22)3(1)9(17)18/h(H,13,14)(H,15,16)(H,17,18)(H,19,20)(H,21,22)(H,23,24), InChI=1/C12H6O12/c13-7(14)1-2(8(15)16)4(10(19)20)6(12(23)24)5(11(21)22)3(1)9(17)18/h(H,13,14)(H,15,16)(H,17,18)(H,19,20)(H,21,22)(H,23,24), O=C(O)c1c(c(c(c(c1C(=O)O)C(=O)O)C(=O)O)C(=O)O)C(=O)O, Except where otherwise noted, data are given for materials in their. Mellitic acid 99% Synonym: Benzenehexacarboxylic acid CAS Number 517-60-2. Mellitic Acid Synthesis and Properties I heard about this acid a long time ago, and suddenly remembered about it, with a sudden urge to make it and test its properties. Mellitic acid may be prepared by warming mellite with ammonium carbonate, boiling off the excess of the ammonium salt and adding ammonia to the solution. The mixture may be separated by dissolving out the ammonium euchroate with water. The ammonium salt is then converted into the lead salt by precipitation with lead acetate, and the lead salt is then decomposed by hydrogen sulfide. From the very little amount of data available on this acid, I have learned that it is actually not impossible to make! Linear Formula C 6 (CO 2 H) 6. The ammonium salt is then converted into the lead salt by precipitation with lead acetate, and the lead salt is then decomposed by hydrogen sulfide. Paramide is a white amorphous powder, insoluble in water and alcohol. EC Number 208-243-6. p. 95. Citing Literature. Molecular Weight 342.17 . The acid may also be prepared by the oxidation of pure carbon, graphite or hexamethylb… Electrochemical oxidation of graphite anode in deionized water at galvanostatic mode is investigated. (1911). The acid may also be prepared by the oxidation of pure carbon, graphite or hexamethylbenzene, by alkaline potassium permanganate in the cold, or by hot concentrated nitric acid.[5]. The high stability of mellitic acid salts and their presence as an endproduct of the oxidation of polycyclic aromatic hydrocarbons, which are present in the solar system, make them a possible organic substance in Martian soil. From the very little amount of data available on this acid, I have learned that it is actually not impossible to make! We investigated the directions of Maumené‐Lecuir, for preparing the potassium salt of mellitic acid by thermal decomposition of the potassium salt of tartaric acid; we obtained only very low yields of mellitic acid by this method. Mellitic acid may be prepared by warming mellite with ammonium carbonate, boiling off the excess of the ammonium salt, and adding ammonia to the solution. Mellitic Acid Synthesis and Properties I heard about this acid a long time ago, and suddenly remembered about it, with a sudden urge to make it and test its properties. The hexachloride of mellitic acid has been prepared in the pure state. Number of times cited according to CrossRef: 2. Beilstein/REAXYS Number 2228443 . and you may need to create a new Wiley Online Library account. By heating the ammonium salt of the acid to 150–160 °C while ammonia is evolved, a mixture of paramide (mellimide, molecular formula C6(CONHCO)3), and ammonium euchroate is obtained.