It is an isomer of isophthalic acid and terephthalic acid. It is also incompatible with oxidizers. See customer reviews, validations & product citations. The chemical structure of phthalic acid is shown in the figure below. The monopotassium salt, potassium hydrogen phthalate is a standard acid in analytical chemistry. This chemical is sensitive to exposure to extreme heat. Solubility insoluble in water. - On cooling to 14, this solutiob should deposit 24.25g of phthalic acid Why should activated carbon be used during a recrystallization If breathing is difficult, give oxygen. The bacteria Pseudomonas sp. Find chemicals information Phthalic acid at guidechem, professional and easy to use. It is slightly soluble in water, alcohol and acetic acid (insoluble in benzene). The overall σ of 159 data points was 0.70 %. Phthalic acid esters (phthalates) have been used as industrial plasticizers in a wide range of consumer 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). Trade names. Inhalation Remove to fresh air. H319: Causes serious eye irritation. Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2.It is an isomer of isophthalic acid and terephthalic acid.Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Phthalic acid definition, any of three isomeric acids having the formula C8H6O4, especially the ortho isomer (orthophthalic acid ), a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume. The chemical structure of phthalic acid is shown in the figure below. Outline the steps of the following procedure. The phthalic acid is somewhat soluble in water. Stability stable. Partition of six phthalic acid esters in soluble and solid residual fractions of wastewater sludges. 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Excerpt from ERG Guide 156 [Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]: Combustible material: may burn but does not ignite readily. [5][6] After the Swiss chemist Jean Charles Galissard de Marignac determined its correct formula,[7] Laurent gave it its present name. Phthalic acid is produced in final stage metabolites of phthalic acid esters. (report to the nearest mL) If solution werecooled to 14°C, how many grams of phthalic acid wouldcrystallize out? Fire Hazard. PHTHALIC ACID is a carboxylic acid. CAS 88-99-3, EC Number 201-873-2, chemical formula C₆H₄(COOH)₂. 1989]. 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. Formula: C 8 H 6 O 4 / C 6 H 4 (COOH) 2 Molecular mass: 166.1 Decomposes at 191°C Relative density (water = 1): 1.6 Solubility in water, g/100ml at 25°C: 0.625 (poor) Relative vapour density (air = 1): 5.7 Flash point: 168°C c.c. Production. 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. Phthalic anhydride hydrolysed rapidly in water forming phthalic acid and carbon dioxide. ... Solubility: 5.74 g/l: Dimensions; Materials Information; Toxicological Information; LD 50 oral: LD50 Rat 7900 mg/kg: Safety Information according to GHS; Hazard Pictogram(s) Hazard Statement(s) H315: Causes skin irritation. These solutions were made up to be 10 and 15% by weight. Believing the resulting substance to be a naphthalene derivative, he named it "naphthalic 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. Similar Structures. Phthalic acid is produced by the catalytic oxidation of naphthalene or ortho-xylene directly to phthalic anhydride and a subsequent hydrolysis of the anhydride. Others have collected phthalic anhydride on glass fiber filters and extracted with dilute aqueous sodium hydroxide (Ref. Hydrolysis by hot water forms ortho-phthalic acid. Fire Hazard. Your email address will not be published. Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and cheaply available. And intermolecular hydrogen bonds, which increase solubility acid, and … Phthalic acid has applications in the preparation of phthalate ester plasticizers[1]. It is the diester formed from terephthalic acid … Phthalic acid. Structure for Phthalic Acid (DB02746) × Close. 2H 2 O. Phthalic acid esters (phthalates) have been used as industrial plasticizers in a wide range of consumer products. As part of your pre-lab assignment, calculate the volume of boiling water required to dissolve 1 g of phthalic acid (use the data given above). Applications. See more. Thus, water is a very good recrystallization solvent for phthalic acid. Dry the wet phthalic acid by placing it in a beaker (unless it already is) and heat it until it dries. PACs (Protective Action Criteria) Chemical PAC-1 PAC-2 PAC-3; Phthalic acid (88-99-3) 24 mg/m3 : 260 mg/m3 : 1600 … - Find MSDS or SDS, a COA, data sheets and more information. This acid was invented by a great French chemist Auguste Laurent through the oxidizing naphthalene tetrachloride. Water Solubility: less than 1 mg/mL at 68° F (NTP, 1992) Ionization Potential: data unavailable. It is incompatible with sodium nitrite. Volatilization of phthalic acid from moist soil surfaces is not expected to be an important fate process (SRC) given an estimated Henry's Law constant of 2X10-11 atm-cu derived from its vapor pressure, 6.36X10-7 mm Hg (3), and water solubility, 6965 mg/L (4). recrystallize phthalic acid, a compound that is used to make synthetic polymers such as Dacron. Zheng Z(1), He PJ, Fu Q, Shao LM, Lee DJ. Phthalic acid is a simple dicarboxylic acid organic compound, a benzoic acid derivative with an additional ortho-carboxylic acid.Phthalic acid is discussed most commonly in relation to its ester derivatives or Phthalic anhydride (sc-203189), both used extensively as industrial plasticizers in the manufacture of polyvinylchlorides and other plastics. Phthalic acid can be used for the synthesis of synthetic agents, such as isophthalic acid (IPA), and terephthalic acid (TPA). The process employs a cobalt-manganese catalyst. It is a dibasic acid, with pKas of 2.89 and 5.51. Your email address will not be published. 44.1) and they are synthetically produced by esterification of phthalic acid with different alcohols. Chemical dangers The solution in water is a weak acid. Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. Phthalic Acid is an isomer of isophthalic acid and terephthalic acid. It is also useful in the production of anthraquinone, phenolphthalein and phthalocyanine pigments. Dry the wet phthalic acid by placing it in a beaker (unless it already is) and heat it until it dries. CAS names. 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. 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. Get medical attention. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2.It is an isomer of isophthalic acid and terephthalic acid.Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Phthalic Acid Structural Formula. Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. ERPGs (Emergency Response Planning Guidelines) No ERPG information available. Phthalic acid is a benzene dicarboxylic acid consisting of 2 carboxy groups at ortho positions. The acid is soluble in water, sparingly soluble in ether. 250g; Plastic bottle. The stoichiometry of formation of the complexes of TBP and TRPO with phthalic acid was 1:1. Weight Average: 166.1308 Monoisotopic: 166.02660868 Chemical Formula C 8 H 6 O 4 Synonyms Not Available Pharmacology Indication Not Available … It is also used as plasticizers for polyvinyl chloride and other polymers. Phthalic acid is however easily dehydrated to form phthalic anhydride. Naphthalene on oxidation with potassium permanganate or potassium dichromate gives phthalic acid. It interacts with magnesium oxide films to generate the following inhibitor mechanisms on a substrate metal to be protected: Absorption by the process of chemisorption, forming a protective film in conjunction with metallic ions PHTHALIC ACID: ICSC: 0768: PHYSICAL & CHEMICAL INFORMATION; Physical State; Appearance CRYSTALLINE POWDER. 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. ortho-Phthalic acid, 1,2-Benzenedioic acid. Phthalic Acid is an isomer of isophthalic acid and terephthalic acid. [4] Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. 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. After 2 weeks 85 % degradation of the test substance was determined, showing ready biodegradbility. The purity of the phthalic acid … 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. Isophthalic acid (1,3-benzenecarboxylic acid) is the meta form of phthalic acid. Sigma-Aldrich offers a number of Phthalic acid products. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Appearance (1), solid. Acid ftalic Phthalic acid for synthesis. Phthalates have been used in food contact materials and are generally allowed for this use. Isophthalic acid is obtained by oxidizing meta-xylene with chromic acid, or by fusing potassium meta-sulphobenzoate, or meta-brombenzoate with potassium formate. Into a reaction tube, using a plastic funnel to make a clean transfer, weigh about 60 mg of phthalic acid accurately (it can be 55 mg or 65 mg but measure the amount exactly). How many mL of boiling water are required to dissolve 92.0 g ofphthalic acid? Other identifiers. Phthalates are diesters of 1,2-benzenedicarboxylic acid (phthalic acid) containing a benzene ring with two ester functional groups (Fig. The experimental data were correlated with the Apelblat equation. Groups of eleven pregnant Wistar rats were fed a diet containing phthalic acid at a dose of 0, 1.25, 2.5, or 5.0 % ad libitum on GD 7 - GD 16 ( 0, 1021, 1763, 2981 mg/kg bw/day). One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and terephthalic acids. Dust explosion possible if in powder or granular form, mixed with air. The stability of the acid due to the formation of an intramolecular hydrogen bond, which Groth high strength of the links therein. Reduction of phthalic acid with sodium amalgam in the presence of water gives the 1,3-cyclohexadiene derivative.[9]. 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. View information & documentation regarding Phthalic acid, including CAS, MSDS & more. RESULTS: Phthalic acid extraction followed the sequence: 10% TRPO > 50% TBP > 1‐octanol, with recoveries from the TRPO and TBP systems being much larger than that for 1‐octanol. Thus, water is a very good recrystallization solvent for phthalic acid. In water, 6,000 mg/L at 25 deg C. Kirk-Othmer Encyclopedia of Chemical Technology . Shop a large selection of Benzene and substituted derivatives products and learn more about Phthalic acid, 99%, ACROS Organics. The solution in water is a weak acid. ... Solubility in mg/100g standard fat at 20°C provides substance information on the substance solubility in standard fat in milligram per 100 gram at a temperature of 20°C. (2.) Structure, properties, spectra, suppliers and links for: Phthalic acid, 88-99-3. AEGLs (Acute Exposure Guideline Levels) No AEGL information available. In a modified MITI test comparable to OECD TG 301 C the biodegradation of phthalic anhydride was investigated (MITI, 1992). It sublimes when … 88-99-3. Isophthalic acid is produced on the billion kilogram/year scale by oxidizing meta-xylene using oxygen. Believing the resulting substance to be a naphthalene derivative, he named it "naphthalic acid". Depending on the alcohols employed, molecules with different physicochemical properties are obtained. Required fields are marked *. EC Inventory, REACH pre-registration, Other, FCM and Articles Regulation, Annex I - Authorised Substances . Soluble in water, alcohol and etherSoluble in alcohol. Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. (NTP, 1992). 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. 2D chemical structure of phthalic acid, the others being phthalic and terephthalic acid was by., 6,000 mg/L at 26 deg C ; 5,964 mg/L at room temperature dimethyl... Will react with water ( some violently ) releasing flammable, toxic or gases! ; consequently, until about 1970 terephthalic acid the widely available phthalic anhydride is a acid... 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