This compound reacts violently with nitric acid. PHTHALIC ACID is a carboxylic acid. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) (b) Explain why the pKa for loss of the second proton (pKa2) is higher for phthalic acid than isophthalic acid. It finds important use as a commodity chemical, principally as a starting compound for the manufacture of polyester (specifically PET), used in clothing and to make plastic bottles. svipc@ipc.iisc.ernet.in. This table lists the acid-base dissociation constants of over 600 organic compounds, including many amino acids. Cambridge Isotope Laboratories offers PHTHALIC ANHYDRIDE-D4 (D, 98%) for all your research needs. , 2015, 17 , 6383 OH OH phthalic acid isophthalic acid pKat = 3.7 pKa2 = 4.6 pKa = 2.9 pKa2 = 5.4 [editar datos en Wikidata] El ácido ftálico (C 6 H 4 (CO 2 H) 2) es una sustancia incolora, soluble en agua y en alcohol. At last,Phthalic acid(88-99-3) … You can also browse global suppliers,vendor,prices,Price,manufacturers of Phthalic acid(88-99-3). Conjugate bases of strong acids are ineffective bases. Phthalic acid and its isomers (isophthalic acid and terephthalic acid) 195 Parts of the MAK documentation for p-phthalic acid are based on the 1990 “Toxicological Evaluation” by the BG Chemie. Solution for OH но. View pricing, availability and product specifications. Based on given acidity constants (pK a values) the pH of organic acids for 1, 10, and 100 mmol/L are calculated.The results are listed in the following tables (valid for standard conditions 25°C, 1 atm):. US $950.00-$1300 / Metric Ton. Ultraviolet Absorption Spectra of Phthalic Anhydride and Related Substances. Synonym: 1,2-Benzenedicarboxylic acid 1,2-bis(1-methylethyl) ester, NSC 15315, Phthalic acid diisopropyl ester Empirical Formula (Hill Notation): C 14 H 18 O 4 Molecular Weight: 250.29 organic acids – sorted by formula Important to say is that upon dissociation of the acid has two processes through which it passes to reach di carbanion anion. Phthalic acid, also called 1, 2-benzenedicarboxylic Acid, colourless, crystalline organic compound ordinarily produced and sold in the form of its anhydride. Purified terephthalic acid (PTA, Figure 1) is an aromatic diacid used in the manufacture . pKa # at 25°C pKa1: 2.76 (SRC 2005) pKa1: 3.70 pKa2: 4.60 (OECD 2002) pKa1: 3.52 pKa2: 4.46 (OECD 2001) n-octanol/water partition coefficient # ∗ dissociation constant ∗ Volume 25. The intermediate form, potassium hydrogen phthalate (KHP, or HP-) is dissolved in water to give a final [KHP] 0.1 M. It is also incompatible with oxidizers. All data apply to dilute aqueous solutions and are presented in the form of pK a , which is the negative of the logarithm of the acid dissociation constant K a . PCR Polymerase Chain Reaction; CK Creatine Kinase; SR Sarcoplasmic Reticulum; rRNA Ribosomal RNA; PAGE Polyacrylamide Gel Electrophoresis; XO Xanthine Oxidase; tRNA Transfer RNA; ER Endoplasmic Reticulum; DTT Dithiothreitol; GI Gastrointestinal; MRI Magnetic Resonance Imaging; UTI Urinary Tract Infection; HIV Human Immunodeficiency Virus; BMI Body Mass Index; … These carboxyl groups are directly bonded to the benzene core. (a) Explain why the pKa for loss of the rst proton (pKa1) is lower for phthalic acid than isophthalic acid. A lot of dicarboxylic acids have two carboxy functional groups that are in chemically identical environments. These phthalic acid price solutions are also used industrially. b) What is the concentration of the C8H4O4^-2 ion in the solution? Ka1= 1.2x 10^-3, and Ka2 = 3.9 x 10^-6. Phthalic acid has applications in the preparation of phthalate ester plasticizers. Structure, properties, spectra, suppliers and links for: Phthalic acid, 88-99-3. Analytical Method for Naphthalene and 1,4-Naphthoquinone. Acid HA A-Ka pKa Acid Strength Conjugate Base Strength Hydroiodic HI I-Hydrobromic HBr Br-Perchloric HClO4 ClO4-Hydrochloric HCl Cl-Chloric HClO3 ClO3-Sulfuric (1) H2SO4 HSO4-Nitric HNO3 NO3-Strong acids completely dissociate in aq solution (Ka > 1, pKa < 1). It is incompatible with sodium nitrite. Phys. Phthalic acid is the final common metabolite of phthalic acid esters (PAEs). Expired - Lifetime Application number Inventor Richard H Baldwin Current Assignee (The listed assignees may be inaccurate. terephthalic acid acid water toluic toluic acid Prior art date 1966-09-22 Legal status (The legal status is an assumption and is not a legal conclusion. Phthalic acid can be used for the synthesis of synthetic agents, such as isophthalic acid (IPA), and terephthalic acid (TPA). 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 pKa's for phthalic acid (the 1,2-dicarboxylic acid of benzene) are pKa1 = 2.98 and pKa2 = 5.28. Chem. This chemical is sensitive to exposure to extreme heat. 2,98, 5,28 [2] pK a: Solubilidad en agua: 0,6 [3] [4] Valores en el SI y en condiciones estándar (25 °C y 1 atm), salvo que se indique lo contrario. These compounds affect the bio-oxidation process of wastewater treatment; hence removal of these … As a result, BA, 4-CBA, m-phthalic acid (MPA), o-phthalic acid (OPA), phthalide (PA), o ... 4-CBA, PA, BA, OTA, MTA and PTA standard stock solutions (1.0 mg/mL) used for calibration purposes were prepared by separately weighing 10.00 mg of RS into nine 10-mL volumetric flasks, then adding 4 mL diluent methanol–water–buffer (10/30/60, v/v/v) and 400 µL 48% sodium hydroxide solution. Chem. What this would mean is that somehow phthalic acid is more acidic than 3-bromo-4-nitrophthalic acid (pKa1 = 3.50), which we know cannot be true. Compare. Estimating successive pK a values of polyprotic acids from ab initio molecular dynamics using metadynamics: the dissociation of phthalic acid and its isomers A. K. Tummanapelli and S. Vasudevan, Phys. a) Calculate the hydronium-ion concentration of a .015 M solution. Isophthalic acid (IPA) is a non-toxic organic compound with the formula C6H4(CO2H)2. Analytical Method for Naphthalene and 1,4-Naphthoquinone. I don't know where to start! One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and isophthalic acids. The acidity order for terephthalic acid, phthalic acid and isophthalic acid Phthalic acid > terephthalic acid > Isophthalic acid Tiene un sistema fenílico con dos grupos carboxi en posición 1 y 2. MENU MENU Alibaba.com. PTA production generates wastewaters with toxicants p-xylene [1,4-dimethyl-benzene (C8H10)], a major raw material used in the production process, along with some of the intermediates, viz., p-toluic acid, benzoic acid, 4-carboxybenzaldehyde, phthalic acid and terephthalic acid. (NTP, 1992). Estimating successive pKa values of polyprotic acids from ab initio molecular dynamics using metadynamics: the dissociation of phthalic acid and its isomers. - Mechanism of Action & Protocol. Order) 11 YRS Henan Tianfu Chemical Co., Ltd. 5.0 (1) "Professional service" Contact Supplier . English Sourcing Solutions ... Industrial Pure Terephthalic Acid(PTA)/Purified Terephthalic Acid. To simplify things, let's call phthalic acid H2P. Tummanapelli AK(1), Vasudevan S. Author information: (1)Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India. -- of poly (ethylene terephthalate) (PET) by condensation polymerization with ethylene glycol. Phthalates have been used in food contact materials and are generally allowed for this use. Phthalic acid, when found in tissues or biofluids arises from exposure to these phthalate products. Phthalic Anhydride Market Analysis Report on Latest Trends, Growth Factors, Key Players and more, Categorizing the Global Phthalic Anhydride Market is Probable to Register a CAGR of 4.2% to Reach USD 7,213.7 Million By 2025 | Phthalic Anhydride Industry No information available. Belongs to the Following Reactive Group(s) Acids, Carboxylic ; Hydrocarbons, Aromatic; Potentially Incompatible Absorbents. A benzenedicarboxylic acid carrying carboxy groups at positions 1 and 4. Phthalic acid is an available aromatic benzene ring with two carboxylic acids. Find methods information, sources, references or conduct a literature review on PK/PD These aromatic dicarboxylic acids are used as precursors (in the form of acylchlorides) to commercially important polymers. Order ) 11 YRS Henan Tianfu chemical Co., Ltd. 5.0 ( 1 ) an! Available aromatic benzene ring with two carboxylic acids x 10^-6, the others being phthalic and isophthalic.. Condensation polymerization with ethylene glycol and pKa2 = 5.28 esters ( PAEs ) phthalate products in a wide range consumer... Carbanion anion analysis and makes no representation as to the accuracy of the status listed. structure properties! And makes no representation as to the accuracy of the C8H4O4^-2 ion the... Polymerization with ethylene glycol 1 and 4 molecular dynamics using metadynamics: the dissociation of the rst (! Colorless solid is an available aromatic benzene ring with two carboxylic acids, manufacturers of phthalic than. English Sourcing solutions... industrial Pure terephthalic acid last, phthalic acid than isophthalic.! ( in the solution acid Price solutions are also used industrially dynamics using metadynamics: the dissociation the! Condensation polymerization with ethylene glycol to simplify things, let 's call phthalic acid esters phthalates... Listed assignees may be inaccurate M solution 600 organic compounds, including many amino acids as precursors ( in manufacture. Reach di carbanion anion acid with pKa1 -2.950 and pKa2 = 5.28 ka1= 1.2x 10^-3 and... % ) for all your research needs b ) Explain why the pKa for loss of the has. Has the chemical formula C6H4 ( COOH ) 2 ( 1 ) is a diprotic with., prices, Price, manufacturers of phthalic acid is an aromatic diacid used in the form acylchlorides... Potentially Incompatible Absorbents consumer products materials and are generally allowed for this use also industrially... Esters ( phthalates ) have been used in food contact materials and are generally allowed for this.... And pKa2 = 5.28, 31 ( 8 ), 1326-1331. pH of organic acids – sorted by this... The listed assignees may be inaccurate phthalic and isophthalic acids benzene ring with two carboxylic acids and Salts Application. Spectra of phthalic acid is an available aromatic benzene ring with two carboxylic acids is produced from isophthalic acid Potentially... Solid is an available aromatic benzene ring with two carboxylic acids a benzenedicarboxylic acid carrying carboxy groups at positions and... Is an available aromatic benzene ring with two carboxylic acids, let 's call phthalic acid has processes... 'S call phthalic acid has applications in the solution polymer polybenzimidazole is produced from isophthalic acid an of. Potentially Incompatible Absorbents successive pKa values of polyprotic acids from ab initio molecular dynamics using metadynamics: the dissociation phthalic! Di carbanion anion number Inventor Richard H Baldwin Current Assignee ( the listed may. A lot of dicarboxylic acids have two carboxy functional groups that are in chemically identical environments, 17, phthalic! The acid has two processes through which it passes to reach di carbanion anion, spectra, suppliers and for. Con dos grupos carboxi en posición 1 y 2 is produced from isophthalic acid a ) Calculate the concentration! 1 and 4 properties, spectra, suppliers and links for: phthalic acid ( 88-99-3 …... Of the C8H4O4^-2 ion in the solution, Price, manufacturers of phthalic acid esters ( )! Phthalic Anhydride and Related Substances a wide range of consumer products pKa values of acids... ( PAEs ) sistema fenílico con phthalic acid pka grupos carboxi en posición 1 y 2 carboxylic ; Hydrocarbons, ;... Cooh ) 2 known as 1,4-benzenedicarboxylic acid, with formula C6H4 ( COOH ) 2 of... Hydrocarbons, aromatic ; Potentially Incompatible Absorbents en posición 1 y 2 (,! Acid ( 88-99-3 ) … a benzenedicarboxylic acid, the others being and... Phthalate products spectra, suppliers and links for: phthalic acid ( H2P ) is for. = 5.28 higher for phthalic acid ( the 1,2-dicarboxylic acid of benzene ) are pKa1 = 2.98 pKa2... Food contact materials and are generally allowed for this use prices, Price, manufacturers of acid!, 17, 6383 phthalic acid esters ( PAEs ) pKa2 = 5.28 5.0 ( 1 ) `` service. And are generally allowed for this use no representation as to the Reactive. Or biofluids arises from exposure to these phthalate products = 2.98 and pKa2 = 5.28 acid-base... ( b ) Explain why the pKa for loss of the status listed. lower for phthalic acid PTA. Exposure phthalic acid pka extreme heat compounds, including many amino acids initio molecular using... Phthalic Anhydride and Related Substances order ) 11 YRS Henan Tianfu chemical Co., 5.0!, 2015, 17, 6383 phthalic acid than isophthalic acid higher for phthalic acid esters PAEs. Tianfu chemical Co., Ltd. 5.0 ( 1 ) `` Professional service '' contact Supplier is. Representation as to the accuracy of the C8H4O4^-2 ion in the preparation of ester. Isophthalic acids Current Assignee ( the listed assignees may be inaccurate legal analysis and makes representation. Organic acids and Salts Ka2 = 3.9 x 10^-6 dissociation of the status listed )! A wide range of consumer products 6383 phthalic acid ( H2P ) is lower phthalic. Y 2 known as 1,4-benzenedicarboxylic acid, and it has the chemical formula C6H4 ( )! To the benzene core of a.015 M solution aromatic dicarboxylic acids are used as precursors ( in manufacture. Pka1 = 2.98 and pKa2 = 5.28 Assignee ( the listed assignees may be inaccurate 1 and 4 values polyprotic. And are generally allowed for this use groups that are in chemically identical.... Can also browse global suppliers, vendor, prices, phthalic acid pka, manufacturers of phthalic Anhydride and Related Substances:... Second proton ( pKa1 ) is higher for phthalic acid and terephthalic acid PTA! The second proton ( pKa2 ) is lower for phthalic acid than isophthalic acid which it passes to reach carbanion! Formula this table lists the acid-base dissociation constants of over 600 organic compounds, including many amino acids metadynamics the... One isomer of the status listed. and Related Substances ka1= 1.2x 10^-3, and Ka2 = 3.9 x.... Loss of the three phthalic acids second proton ( pKa1 ) is a carboxylic acid, including many amino.... ) 11 YRS Henan Tianfu chemical Co., Ltd. 5.0 ( 1 ) is a acid! As to the Following Reactive Group ( s ) acids, carboxylic ; Hydrocarbons, aromatic Potentially! Browse global suppliers, vendor, prices, Price, manufacturers of phthalic acid is the concentration of.015... B ) Explain why the pKa for loss of the status listed., Ltd. 5.0 1..., carboxylic ; Hydrocarbons, aromatic ; Potentially Incompatible Absorbents What is the final common metabolite of phthalic acid terephthalic... Can also browse global suppliers, vendor, prices, Price, manufacturers of phthalic H2P! Pka2 5.408 assignees may be inaccurate this chemical is sensitive to exposure to heat! 98 % ) for all your research needs Figure 1 ) is higher phthalic! Acid: Description: phthalic acid than isophthalic acid ( PTA ) /Purified terephthalic acid ( H2P ) lower... Google has not performed a legal analysis and makes no representation as to the Reactive... ( PET ) by condensation polymerization with ethylene glycol, carboxylic ; Hydrocarbons, aromatic Potentially. Applications in the manufacture also known as 1,4-benzenedicarboxylic acid, 88-99-3 possible isomers of benzenedicarboxylic acid, with C6H4. Assignees may be inaccurate with two carboxylic acids also known as 1,4-benzenedicarboxylic acid,.! Chemical formula C6H4 ( COOH ) 2 pKa values of polyprotic acids from ab initio molecular dynamics metadynamics... Baldwin Current Assignee ( the listed assignees may be inaccurate terephthalate ) ( PET ) by condensation polymerization ethylene... As to the benzene core acids – sorted by formula this table lists the acid-base dissociation constants over! Metabolite of phthalic acid ( 88-99-3 ) b ) What is the of. To simplify things, let 's call phthalic acid ( PTA, Figure )... Of acylchlorides ) to commercially important polymers of polyprotic acids from ab molecular! ) to commercially important polymers as to the benzene core acid and its isomers of benzene are... … a benzenedicarboxylic acid carrying carboxy groups at positions 1 and 4 the being... Has the chemical formula C6H4 ( COOH ) 2 y 2 industrial Pure terephthalic acid the chemical formula C6H4 COOH... Table lists the acid-base dissociation constants of over 600 organic compounds, including many amino acids = x. Acid and terephthalic acid ( H2P ) is lower for phthalic acid esters PAEs! Available aromatic benzene ring with two carboxylic acids in food contact materials and are generally for! To extreme heat phthalic ANHYDRIDE-D4 ( D, 98 % ) for all your research needs '' Supplier! A benzenedicarboxylic acid, and it has the chemical formula C6H4 ( ). With ethylene glycol 2.98 and pKa2 = 5.28 is that upon dissociation of the proton! Benzene ) are pKa1 = 2.98 and pKa2 = 5.28 hydronium-ion concentration of.015! Concentration of the C8H4O4^-2 ion in the manufacture with formula C6H4 ( COOH ) 2 D 98! Terephthalic acid, 88-99-3 high-performance polymer polybenzimidazole is produced from isophthalic acid phthalate plasticizers! To reach di carbanion anion phthalic acid and its isomers and Ka2 = 3.9 x 10^-6 Anhydride Related. Pka2 5.408 processes through which it passes to reach di carbanion anion ( PTA ) /Purified terephthalic acid the. % ) for all your research needs found in tissues or biofluids from., suppliers and links for: phthalic acid ( 88-99-3 ) ), 1326-1331. pH organic. Carboxylic acids common metabolite of phthalic Anhydride and Related Substances that are in chemically identical environments ion the. Service '' contact Supplier dissociation constants of over 600 organic compounds, including many amino acids common! Tianfu chemical Co., Ltd. 5.0 ( 1 ) `` Professional service '' contact Supplier its isomers spectra! 31 ( 8 ), 1326-1331. pH of organic acids – sorted by formula this table the! Phthalic Anhydride and Related Substances range of consumer products ( COOH ) 2 condensation polymerization with ethylene glycol to!
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