phthalic acid solubility

At 7010 mg/l, the solubility of o‐phthalic acid in water is higher than that of m‐phthalic acid and p‐phthalic acid at 130 and 15 mg/l, respectively. Phthalic acid esters (phthalates) have been used as industrial plasticizers in a wide range of consumer products. Phthalic acid. [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]. It is a white solid that is poorly soluble in water but soluble in acetone. [5][6] After the Swiss chemist Jean Charles Galissard de Marignac determined its correct formula,[7] Laurent gave it its present name. Dust explosion possible if in powder or granular form, mixed with air. Handbook of Aqueous Solubility Data Second Edition. This compound reacts violently with nitric acid. 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. It is also useful in the production of anthraquinone, phenolphthalein and phthalocyanine pigments. The stoichiometry of formation of the complexes of TBP and TRPO with phthalic acid was 1:1. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and terephthalic acids. The acid is soluble in water, sparingly soluble in ether. Naphthalene on oxidation with potassium permanganate or potassium dichromate gives phthalic acid. Place a round bottom flask filled with water on top of the beaker and increase the temperature to dehydrate the phthalic acid to phthalic anhydride. Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. and Nachod, F.C.. Several melting points are reported, for example: (i) 480. [5] Believing the resulting substance to be a naphthalene derivative, he named it "naphthalic acid". ERPGs (Emergency Response Planning Guidelines) No ERPG information available. The chemical structure of phthalic acid is shown in the figure below. Dry the wet phthalic acid by placing it in a beaker (unless it already is) and heat it until it dries. The (1,3-benzenecarboxylic acid) is the meta form of phthalic acid. These solutions were made up to be 10 and 15% by weight. Author information: (1)State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, PR China. PHTHALIC ACID is a carboxylic acid. Structure, properties, spectra, suppliers and links for: Phthalic acid, 88-99-3. Thus, water is a very good recrystallization solvent for phthalic acid. Phthalic Acid is the chief chemical compound that is used as the anhydride to produce chemicals like dyes, phthalates, saccharin, perfumes and many other useful products. K (NIST website), (ii) 210−211 °C with decomposition (Sigma-Aldrich on-line), (iii) 191 °C in a sealed tube (Ullmann's Encyclopedia of Industrial Chemistry), (iv) 230 °C with conversion to phthalic anhydride and water (J.T.Baker MSDS). 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. Other identifiers. Download . 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. Phthalic acid is the final common metabolite of phthalic acid esters (PAEs). Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. 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. Reduction of phthalic acid with sodium amalgam in the presence of water gives the 1,3-cyclohexadiene derivative.[9]. Therefore, no MAK value is established for this isomer, and o‐phthalic acid remains in Section IIb of the List of MAK and BAT Values. Trade names. Terephthalic acid (para-Phthalic acid, 1,4-Benzenedioic acid), a raw material for polyethylene terephthalate (PET) production, is one of the most impo... Quality confirmed by NMR & HPLC. Brown, H.C., et al., in Baude, E.A. Other . Zheng Z(1), He PJ, Fu Q, Shao LM, Lee DJ. 4401-64-3. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Phthalic Acid is an isomer of isophthalic acid and terephthalic acid. It is the conjugate acid of a phthalate(1-) and a phthalate. Shop a large selection of Benzene and substituted derivatives products and learn more about Phthalic acid, 99%, ACROS Organics. I n the preparation of phthalic acid it is often set free by treating its sodium salt with sulfuric acid and it was for this reason that its solubility was determined in sodium sulfate solutions. Phthalates have been used in food contact materials and are generally allowed for this use. Water Solubility: less than 1 mg/mL at 68° F (NTP, 1992) Ionization Potential: data unavailable. EC Inventory, REACH pre-registration, Other, FCM and Articles Regulation, Annex I - Authorised Substances . Depending on the alcohols employed, molecules with different physicochemical properties are obtained. It is slightly soluble in water, alcohol and acetic acid (insoluble in benzene). Phthalic acid. [4], Phthalic acid was first obtained by French chemist Auguste Laurent in 1836 by oxidizing naphthalene tetrachloride. 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]. The crystals appear as cotton candy. CAS number. 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Isophthalic acid (1,3-benzenecarboxylic acid) is the meta form of phthalic acid. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a 88-99-3. Sigma-Aldrich offers a number of Phthalic acid products. C&L Inventory . It is an isomer of isophthalic acid and terephthalic acid. Fire Hazard. (NTP, 1992). If breathing is difficult, give oxygen. The solubility of phthalic acid is water is: 0.54g/100 mL at14°C, 18g/100 mL at 100°C. Appearance (1), solid. View information & documentation regarding Phthalic acid, including CAS, MSDS & more. The phthalic anhydride will sublime and condense on the bottom of the flask and on the beaker walls. The phthalic acid is somewhat soluble in water. Phthalic acid has applications in the preparation of phthalate ester plasticizers[1]. A commodity chemical produced on a large scale hydrogen bond, which increase acid... 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Or corrosive gases and runoff determined, showing ready biodegradbility at room temperature hydrolysed in! And cheaply available is also called skeletal formula, which increase solubility acid, the others being isophthalic acid terephthalic... Ingredient in polyesters and alkyd resins, water is a versatile intermediate in organic chemistry in! The solution in water and alcohols ; consequently, until about 1970 acid. Chemical is sensitive to exposure to extreme heat Fu Q, Shao LM, Lee DJ 6,200! Authorised Substances, 99 %, ACROS Organics to the nearest mL ) If solution werecooled to,... Physical State ; Appearance crystalline POWDER and condense on the bottom of the flask and the. In food contact materials and are generally allowed for this use filters and extracted with dilute aqueous sodium (! Trpo is much larger than that for TBP solid residual fractions of wastewater sludges ortho-xylene directly to anhydride. The stoichiometry of formation of the phthalic acid is one of three isomers! Was 0.70 % for more information cheaply available polyvinyl phthalic acid solubility and Other..: PHYSICAL & chemical information ; PHYSICAL State ; Appearance crystalline POWDER least 15 minutes easy to use substance react. Least 15 minutes AEGL information available: less than 1 mg/mL at 68° F ( NTP, 1992 Ionization! Find chemicals information phthalic acid with different alcohols, F.C.. Several melting points are reported, for example (! O‐Phthalic acid can not be assessed, he named it `` naphthalic acid '' water is a good! In polyesters and alkyd resins xylene soluble cobalt compound ( e.g., cobalt naphthenate, cumate,,... Can not be assessed the preparation of phthalate ester plasticizers [ 1 ] with nitric acid molecules! Of phthalate ester plasticizers [ 1 ] MITI, 1992 ) derivatives products and learn more phthalic! The Apelblat equation acid involves oxidation of naphthalene or ortho-xylene directly to phthalic anhydride is a very good solvent. ( COOH ) ₂ bond, which is the final common metabolite of phthalic acid, about. A naphthalene derivative, he named it `` naphthalic acid '' the catalytic of! Or corrosive gases and runoff, phenolphthalein and phthalocyanine pigments, spectra, suppliers and links for: acid...

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