meta phthalic acid

2019 Apr;26(10):9435-9442. doi: 10.1007/s11356-019-04373-1. UNII-X35216H9FJ. (benzenedicarboxylic acid), C 6 H 4 (COOH) 2, any one of three dicarboxylic acids of the aromatic series: ortho-phthalic acid (or simply phthalic acid), meta-phthalic acid (or isophthalic acid), and para-phthalic acid (or terephthalic acid).All three are colorless crystals, with melting points of 200°C (with decomposition), 348°C, and 425°C (in a sealed tube), respectively. By clicking on, Creative Commons Attribution-Share-Alike License 3.0. However, many phthalate esters have been implicated as endocrine disruptors. This colorless solid is an isomer of phthalic acid and terephthalic acid. EINECS 204-506-4. V. Phenyl derivatives, Water-participation in the crystalline-state photodimerization of cinnamic acid derivatives. Example III Example IV A sample of anhydrous calcium meta-phthalate was placed in an enclosed glass reaction vessel in an oxidizing atmosphere (air) and heated to a temperature of approximately 800 degrees- Fahrenheit for minutes. Acide isophtalique [French] Kyselina isoftalova [Czech] NSC 15310. Part II. Isophthalic acid is an organic compound with the formula C6H4(CO2H)2. phthalic acid (plural phthalic acids) (organic chemistry) Any of three isomeric aromatic organic benzenedicarboxylic acids, C 6 H 4 (COOH) 2; especially the ortho-isomer manufactured from naphthalene, used in the synthesis of dyes, perfumes and other compounds. It has a role as a human xenobiotic metabolite. The reaction between indole and acetic anhydride, Process for the preparation of benzoic acid and benzoates, Bicyclic structures prohibiting the walden inversion. Different isomers of phthalic acid are known by different names. US3027400A US5631A US563160A US3027400A US 3027400 A US3027400 A US 3027400A US 5631 A US5631 A US 5631A US 563160 A US563160 A US 563160A US 3027400 A US3027400 A US 3027400A Authority US United States Prior art keywords alcohol trimellitic acid Having described my invention, what I claim as novel and desire to secure by Letters Patent is: l. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner salt of meta-phthalic acid and a divalent metal to'a'temperature of 500 degrees F. to approximately 850 degrees F. to form metaphthalic acid anhydride vapor and then condensing the meta-phthalic acid anhydride vapor. meta-Phosphoric acid pieces for analysis (stabilized with sodium metaphosphate) EMSURE® - Find MSDS or SDS, a COA, data sheets and more information. The bacteria Pseudomonas sp. 55,823. See more. Temperatures between 500 degrees Fahrenheit and "850 degrees Fahrenheit have been found suitable for the preparation of meta-phthalic anhydride by heating of a salt of a di-valent metal andmeta-phthalic acid. The anhydride may be separated from these other materials which may distill with it by reesublimation, extraction with a solvent such as benzene, or by other suitable separation methods. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner calcium meta-phthalate to a temperature of approximately 800 degrees Fahrenheit to form meta-phthalic acid anhydride vapor, and condensing the meta-phthalic acid anhydride. 2017 Oct;229:655-660. doi: 10.1016/j.envpol.2017.06.083. 31, pp. Isophthalic acid definition, a colorless, crystalline, slightly water-soluble solid, C8H6O2, the meta isomer of phthalic acid: used chiefly in the manufacture of resins and plasticizers. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner meta-phthalate of di-valent lead to a temperature of 500 degrees Fahrenheit to 850 degrees Fahrenheit ,to form meta-phthalic acid anhydride vapor, and condensing the metaphthalic acid anhydride. Listen to the audio pronunciation of Meta-phthalic acid on pronouncekiwi. .A p ma bb ct 9 this n tipn is to repare t e an rdr. You can also submit buying request for the Phthalic acid and specify your requirement on okchem.com, and we will help you find the quality Phthalic acid … by carboxylation, Manufacture of a lower fatty acid anhydride, Process for producing beta-fluoroethyl thiolacetate, Preparation of unsaturated chloronitriles, CCXC.âAn accessible derivative of chromonol, 213. P1 degrades phthalic acid. Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. PubChem Substance ID 329763040. The substance identifiers displayed in the InfoCard are the best available substance name, EC number, CAS number and/or the … Kyselina isoftalova. 75701-44-9. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. For example, the optimum temperature for preparing metav-phthalic anhydride by heating of the meta-phthalate of di-valent lead alone appears to be approximately 800 degrees Fahrenheit. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. The material dissolves in aqueous alkali, such as ten percent sodium hydroxide solution; and when the sodium hydroxide solution is neutralized and rendered weakly acid with acetic acid, it gives an orange-pink color upon addition of ferric ion. Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. It is an isomer of isophthalic acid and terephthalic acid. [10], This article uses material from the Wikipedia article It is slightly soluble in water, alcohol and acetic acid (insoluble in benzene). BRN 1909332. meta-benzenedicarboxylic acid. The preparation of phthalocyanine and some metallic derivatives from o-cyanobenzamide and phthalimide, 14-hydroxymorphinone and 8, 14-dihydroxydihydromorphinone, Antimonial analogues of the cacodyl series, Process for the production of terephthalic acid, Reacting calcium carbonated and wet process phosphoric acid, Substituted 1, 10-Phenanthrolines. AI3-16107. Phthalic acid was first obtained by French chemist Auguste Laurent in 1836 by oxidizing naphthalene tetrachloride. The product of each example was found to sublime at a temperature of about 361 degrees Fahrenheit but did not have any observable melting point at atmospheric pressure. Sign in to disable ALL ads. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. CHEBI:30802. A new type of organic photoreaction, Improvements in the preparation of organophosphonic acids and their salts, Hydroxybenzeneboronic acids and anhydrides, STUDIES OP CERTAIN RED PIGMENTS FORMED FROM 2âTHIOBARBITURIC ACID a. Substance identity Substance identity. Empirical Formula (Hill Notation) C 8 H 5 BrO 4. 6. HSDB 2090. Environ Sci Pollut Res Int. NACRES NA.22 t h arr yqr d 9 me a-Phin as and t9 met od of mak g m t -Fe a e acid an hydride- 'Hemtei re. The synthesis of 1-bromotriptycene, 1,3,5,7-Naphthalenetetracarboxylic acids and process for preparation thereof. How do you say Meta-phthalic acid? Ea'ample I A sample of the meta.-phtha'l ate of di-valent ,leacl having a White color' was placed in an Example II A second sample of" the meta-phthalate of divalent lead was placed in an enclosed glass reaction vessel in an oxidizing atmosphere (air) and heated to a temperature of between degrees Fahrenheit and 850 degrees Fahrenheit for 10 minutes. 5-Bromoisophthalic acid Synonym: 5-Bromo-1,3-benzenedicarbonic acid, 5-Bromo-1,3-benzenedicarboxylic acid, 5-Bromoisophthalic acid CAS Number 23351-91-9. THE INNER ANHYDRIDE OF METAPHTHALIC ACID. It was relatively insoluble in water, moderately soluble in ethanol and very soluble in benzene and exhibited the other properties set out hereinabove. In the preparation of meta-phthalic anhydride, a salt of meta-phthalic acid and a divalent metal, such as lead or copper metaphthalate, may first be subjected to radiant energy. 1. t. The same product is obtained when thesalt is heated alone .to slightly higher optimum temperatures. 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 9 met p thal c aci A u h 9 0 f thi fi l $33 1 i $9 p. 0- de a m t d f prepa n th a h dride c m -p iha a d. wh ch wi l b re erre to hereinafter as meta-phthalic anhydride. A process for preparing the inner anhydride of meta-phtnalic acid which comprises heating the inner salt of meta-phthalic acid and a divalent metal to a temperature of approximately 750 degrees Fahrenheit to 850 degrees Fahrenheit to form meta-phthalic acid anhydride vapor, and condensing the meta-phthalic acid anhydride. meta-xylene, meta-phthalic acid Introduction As one of the most important aromatic compounds, meta-phthalic (MPA) is widely used in organic synthesis, particu-larly in the polyester and paint industry. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Creative Commons Attribution-Share-Alike License 3.0. and condensing the meta-phthalic acid anhydride. Systematic review and meta-analysis on the association between … The inner anhydride of meta-phthalic acid. Application Qetober 15, 1948, Serial No. gOn cooling, the meta-phthalic anhydride crystallizes in the form of slender, long, transparent 'to white needles or feathers. The material is slightly soluble in hot water to give a solution having an acid reaction. 6, 1948 2,443,494 Cass June 15, 1948 OTHER REFERENCES Bucher et al., J. The isophthalic acid market was rather tight during 2017 and part of 2018, but there have been new investments in 2019. Orthophthalic acid definition, See under phthalic acid (def. 4. The ortho isomer (1,2-benzene carboxylic acid) is called simple phthalic acid and the isomer of meta is isophthalic acid (1,3-benzene carboxylic acid). Commercially, the majority of MPA is produced by the air oxidation of meta-xylene (MX) in acetic acid (HAc) in the temperature range Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. The stoichiometry of the complex formation of TBP or TRPO and phthalic acid is 1:1, and the apparent extraction equilibrium constant for TRPO is much larger than that for TBP. iso-phthalic acid. The monopotassium salt, potassium hydrogen phthalate is a standard acid in analytical chemistry. In carboxylic acid: Aromatic acids …dicarboxylic acids are called phthalic, isophthalic, and terephthalic acid, for the ortho, meta, and para isomers, respectively. Phthalate esters and childhood asthma: A systematic review and congener-specific meta-analysis Environ Pollut. There is a list of all It is a white crystalline solid subliming at 345°C. Epub 2019 Feb 8. See more. [5], Phthalic acid is produced by the catalytic oxidation of naphthalene or ortho-xylene directly to phthalic anhydride and a subsequent hydrolysis of the anhydride.[5]. It is an isomer of isophthalic acid and terephthalic acid. Isophthalic acid, 99%. A process for preparing the inner anhydride of meta-phthalic acid which comprises heating the inner cupric meta-phthalate to a temperature of 500 degrees Fahrenheit to 850,degrees Fahrenheit to form meta-phthalic acid anhydride vapor. As one of the most important aromatic compounds, meta ‐phthalic (MPA) is widely used in organic synthesis, particularly in the polyester and paint industry. Dec. 14, 1937 2,116,656 Dreyfus May 10, 1938 2,439,203 Ellingboe Apr. Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2. 3. It is a conjugate acid of a phthalate (1-) and a phthalate. authors in Wikipedia, database,rohs,reach,compliancy,directory,listing,information,substance,material,restrictions,data sheet,specification, InChI=1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12), InChI=1/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12), Except where otherwise noted, data are given for materials in their, This website uses tracking mechanisms by using technically not necessary cookies in order to offer and constantly improve its services, and to provide individual offers. Phthalocyanines. The (1,3-benzenecarboxylic acid) is the meta form of phthalic acid. meta phthalic acid anhydride acid anhydride degrees fahrenheit Prior art date 1948-10-15 Legal status (The legal status is an assumption and is not a legal conclusion. A wide variety of Phthalic acid options are available to you. Slender transparent to white needles and feathers of meta-phthalic anhydride sublimed and condensed in cooler parts f the reaction vessel. he h dr de 9 meta-rh lie acid has t b en lmpwn- The anhy r de 9 phth acid is c mma but meth ds by which ortho-phthalic acid anhydride is prepared have ot suc es nll rroduced th anhvd de of meta-phthalic acid. This meta-analysis aims to evaluate the association between five different phthalate metabolites and endometriosis, based on current evidence. Phthalic acid is converted to its anhydride simply by heating (see below Polycarboxylic acids).Phthalic anhydride is used to make polymeric resins called alkyd resins, which are used as coatings, especially for Patented Oct. 9, 1 951 OFF-EC META PHT-H-ALIC ACID ANHYDRIDE AND METHOD OF MAKING SAME GeorgeWalton, Cincinnati, Ohio N Drawing. Molecular Weight 245.03 . It is a dibasic acid, with pKa's of 2.89 and 5.51. Included PubMed, WOS ( web of science ), and very soluble in ethanol very! By different names offers 37 phthalic acid is of modest commercial importance, the closely related phthalic..., moderately soluble in benzene ) empirical formula ( Hill Notation ) C 8 5... 15, 1948 other REFERENCES Bucher et al., J to you 1-bromotriptycene, 1,3,5,7-Naphthalenetetracarboxylic acids and process of same..., J, potassium hydrogen phthalate is a conjugate acid of a phthalate 1-. 1948 other REFERENCES Bucher et al., J PubMed, WOS ( web of science,... 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