A quantitative structure-property relationship (QSPR) method for the correlation of physical-chemical properties and partition coefficients, namely the 'three solubility' approach, is described and applied to a group of 22 phthalate esters. www.sciencemadness.org/smwiki/index.php/Potassium_hydrogen_phthalate Phthalic acid is used as an active ingredient in polyesters and alkyd resins. A recent food safety concern has arisen from the unapproved use of certain phthalates in a broad range of food/nutraceutical ingredients from Taiwan [53]. Phthalsäure . It is also used as plasticizers for polyvinyl chloride and other polymers. If breathing is difficult, give oxygen. It is also incompatible with oxidizers. PHTHALIC ACID is a carboxylic acid. For more information on any chemical compound, refer BYJU’S. Required fields are marked *. A recent food safety concern has arisen from the unapproved use of certain phthalates in a broad range of food/nutraceutical ingredients from Taiwan [53]. Phthalic acid is very soluble in boiling water, 18 g/100 mL, and is much less soluble in chilled (14°C) water, 0.54 g/100 mL. - On cooling to 14, this solutiob should deposit 24.25g of phthalic acid Why should activated carbon be used during a recrystallization The phthalic anhydride will sublime and condense on the bottom of the flask and on the beaker walls. 250g; Plastic bottle. Production. Phthalic acid is produced by the catalytic oxidation of naphthalene or ortho-xylene directly to phthalic anhydride and a subsequent hydrolysis of the anhydride.. Phthalic acid was first obtained by French chemist Auguste Laurent in 1836 by oxidizing naphthalene tetrachloride. Ullmann's Encyclopedia of Industrial Chemistry, "Sur l'acide naphtalique et ses combinaisons", "Ueber Naphthalinsäure und ihre Verbindungen", "Ueber die Naphtalinsäure und ein bei ihrer Darstellung entstehendes flüchtiges Produkt", "Sur de nouvelles combinaisons nitrogénées de la naphtaline et sur les acides phtalique et nitrophtalique", "Ueber neue stickstoffhaltige Verbindungen des Naphtalins, über Phtalinsäure und Nitrophtalinsäure", https://en.wikipedia.org/w/index.php?title=Phthalic_acid&oldid=960938009, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Articles with changed ChemSpider identifier, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, Reprinted in German as: Auguste Laurent (1836), Reprinted in German as: Auguste Laurent (1842), This page was last edited on 5 June 2020, at 18:53. The solubilities of benzoic acid and phthalic acid in acetic acid + water solvent mixtures are determined by a static method. Isophthalic acid is obtained by oxidizing meta-xylene with chromic acid, or by fusing potassium meta-sulphobenzoate, or meta-brombenzoate with potassium formate. It is the diester formed from terephthalic acid … The solution in water is a weak acid. The stability of the acid due to the formation of an intramolecular hydrogen bond, which Groth high strength of the links therein. Acid ftalic Phthalic acid for synthesis. Reduction of phthalic acid with sodium amalgam in the presence of water gives the 1,3-cyclohexadiene derivative.[9]. CAS 88-99-3, EC Number 201-873-2, chemical formula C₆H₄(COOH)₂. The solubility of o-phthalic acid in methanol + water and methanol + butyl acetate was measured at temperatures ranging from (295.87 to 359.75) K using a laser-monitoring observation technique at atmospheric pressure. As part Dust explosion possible if in powder or granular form, mixed with air. C&L Inventory . A laboratory route to p-toluic acid involves oxidation of p-cymene with nitric acid. Similar Structures. recrystallize phthalic acid, a compound that is used to make synthetic polymers such as Dacron. Phthalic acid esters (phthalates) have been used as industrial plasticizers in a wide range of consumer products. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. Recrystallization of Phthalic Acid. MW: 390.5 Log K ow: 7.94 Solubility in water: 0.34 mg l −1: Pharmaceutical packages, construction materials, glues, varnishes: Di-(n-butyl)-phthalate: DBP: MW: 278.4 Log K ow: 4.45 Solubility in water: 11.2 mg l −1: Solvent, aroma fixative, plasticizer of nitrocellulose and poly acetate vinyl ester: Di … Other . Phthalic acid, also called 1, 2-benzenedicarboxylic Acid, colourless, crystalline organic compound ordinarily produced and sold in the form of its anhydride. The bacteria Pseudomonas sp. The crystals appear as cotton candy. [4] Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. It is a dibasic acid, with pKas of 2.89 and 5.51. Your email address will not be published. Microscale. Weight Average: 166.1308 Monoisotopic: 166.02660868 Chemical Formula C 8 H 6 O 4 Synonyms Not Available Pharmacology Indication Not Available … CAS 88-99-3, EC Number 201-873-2, chemical formula C₆H₄(COOH)₂. Structure, properties, spectra, suppliers and links for: Phthalic acid, 88-99-3. Because of these differences, the local effect of o‐phthalic acid cannot be assessed. [5][8] Manufacturing methods in the nineteenth century included oxidation of naphthalene tetrachloride with nitric acid, or, better, oxidation of the hydrocarbon with fuming sulfuric acid, using mercury or mercury(II) sulfate as a catalyst.[5]. 88-99-3. The experimental temperature ranges from (298.3 to 367.9) K, and the mass fraction of acetic acid in the solvent mixtures ranges from 0.8 to 1.0. Results of our experimental measurements, combined with published solubility data for isophthalic acid dissolved in ethyl acetate, acetic acid, acetophenone, acetone, cyclohexanone, propyl acetate… Slightly soluble in water, methanol and ether. Phthalic Acid is an isomer of isophthalic acid and terephthalic acid. Physical dangers. Because both these methods convert the collected phthalic anhydride to, and analyze as, phthalic acid, they are susceptible to positive interference from any phthalic acid originally present in the air. (report to the nearest mL) If solution werecooled to 14°C, how many grams of phthalic acid wouldcrystallize out? It sublimes when … [5] Believing the resulting substance to be a naphthalene derivative, he named it "naphthalic acid". It is the conjugate acid of a phthalate(1-) and a phthalate. Phthalic acid is very soluble in boiling water, 18 g/100 mL, and is much less soluble in chilled (14°C) water, 0.54 g/100 mL. Download . In a modified MITI test comparable to OECD TG 301 C the biodegradation of phthalic anhydride was investigated (MITI, 1992). Dimethyl terephthalate(DMT) is an organic compound with the formula C6H4(COOCH3)2. Benzenedicarboxylic acid, with formula C6H4 ( CO2H ) 2 water gives the 1,3-cyclohexadiene derivative. [ 9.! ) 2 used as industrial plasticizers in a wide range of consumer products skeletal formula, which the... Organic chemistry, in part because it is a commodity chemical produced on a large scale the form. 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