Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. It is an important industrial chemical used in the production of plasticizers, dyestuffs, and pharmaceuticals. Meaning: A white cyclic anhydride. The pale yellow crystal of phenolphthalein was first synthesized from phthalic anhydride and phenol in 1871 by Adolf von Baeyer, a German chemist. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans. Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. It is the anhydride of phthalic acid.This colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Copyright © 2011. This compound is classified as an odorless and tasteless mild organic acid; inhaling this substance may cause sneezing and coughing. the act of a person who encloses something in or as if in a casing or covering, a school giving instruction in one or more of the fine or dramatic arts, a comic character, usually masked, dressed in multicolored, diamond-patterned tights, and carrying a wooden sword or magic wand, Dictionary.com Unabridged "Recognised" - meaning that the concern is indicated in an official source. : a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins. See more. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition “Capital” vs. “Capitol”: Do You Know Where You’re Going? What Is An Em Dash And How Do You Use It? THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION … Acids accelerate the reaction with water. Dorp (Ber.,1874,7,P.578) obtained orthobenzoyl benzoic acid by heating phthalic anhydride with benzene in the presence of aluminium chloride. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Formula: C. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. Phthalic anhydride is an important starting product in the manufacture of various phthalic-acid derivatives, including esters, phthalimide, and phthalonitrile. a white, crystalline, slightly water-soluble solid, C, a white crystalline substance used mainly in producing dyestuffs. The Dictionary.com Word Of The Year For 2020 Is …. We Asked, You Answered. Phthalimide is the organic compound with the formula C 6 H 4 (CO) 2 NH. Looking for online definition of Phthalanhydride in the Medical Dictionary? phthalic anhydride. Phthalic definition, of or derived from phthalic acid. What is Phthalanhydride? It reacts exothermically when in contact with water and as such can accelerate … A white crystalline compound, C 8 H 4 C 3, the anhydride of phthalic acid, used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. phthalic anhydride n (Elements & Compounds) a white crystalline substance used mainly in producing dyestuffs. Chemical formula: C … ... Phthalic anhydride . Describe 2020 In Just One Word? acid anhydride (plural acid anhydrides) ( organic chemistry ) A class of organic compounds having two acyl groups bonded to the same oxygen atom . Noun . Phthalic anhydride definition: white crystalline substance used mainly in producing dyestuffs | Meaning, pronunciation, translations and examples Definition of phthalic anhydride. If your language skills aren’t already top-notch, then this vocab quiz can get you up to speed! Structure, properties, spectra, suppliers and links for: Phthalic anhydride, 85-44-9. ¹ PHTHALIC ANHYDRIDE reacts exothermically with water. Phthalic anhydride (PA) is the dominant saturated dibasic acid used in the manufacture of polyesters. Phthalic anhydride is an organic compound, the anhydride of phthalic acid. The reactions are sometimes slow, but can become violent when local heating accelerates their rate. Phthalic anhydride can … Phthalic anhydride is a white (lustrous needles) solid that is slightly soluble in water. phthalic anhydride (uncountable) (organic chemistry) The acid anhydride of phthalic acid; manufactured by the oxidation of xylene or naphthalene, widely used in the synthesis of dyes, insecticides, plasticizers and pharmaceuticals. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins The American Heritage® Science Dictionary Pronunciation of phthalic anhydride with 1 audio pronunciation, 1 synonym, 1 meaning, 11 translations and more for phthalic anhydride. Meaning of Phthalanhydride medical term. This colorless solid is an important industrial chemical, especially for the large–scale production of plasticizers for plastics. It was the first anhydride of a dicarboxylic acid to be used commercially. Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A.All rights reserved. The American Heritage® Stedman's Medical Dictionary Phthalic anhydride is the anhydride of phthalic acid. Phthalic anhydride is the organic compound with the formula C 6 H 4 (CO) 2 O. Definition of Phthalic anhydride. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. *Please select more than one item to compare n. A white crystalline compound, C 8 H 4 C 3, the anhydride of phthalic acid, used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. “Affect” vs. “Effect”: Use The Correct Word Every Time. ... phthalic anhydride. Phthalic is contained in 2 matches in Merriam-Webster Dictionary. It is presently obtained by catalytic oxidation of ortho–xylene or naphthalene. It is the imide derivative of phthalic anhydride.It is a sublimable white solid that is slightly soluble in water but more so upon addition of base.It is used as a precursor to other organic compounds as a masked source of ammonia. can also be synthesized by heating catechol with phthalic anhydride and sulphuric acid at 150 C. ' 'C 6 H4>Cg>O+C 6 H4(OH)2[1.2] = H 2 0 -}-C6H4C6H2(OH)2. All Rights Reserved. 1. Why Do “Left” And “Right” Mean Liberal And Conservative? Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. The Most Surprisingly Serendipitous Words Of The Day. phthalic anhydride A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Hypernyms ("phthalic anhydride" is a kind of...): anhydride (a compound formed from one or more other compounds in a reaction resulting in removal of water) Published by Houghton Mifflin Company. phthalic anhydride. How to say phthalic anhydride in English? anhydride definition in English dictionary, anhydride meaning, synonyms, see also 'acetic anhydride',acid anhydride',acyl anhydride',phthalic anhydride'. Learn definitions, uses, and phrases with phthalic. Data compiled as indicated in comments: ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein DH- Eugene S. Domalski and Elizabeth D. Hearing A crystalline compound made by oxidizing naphthalene, used as an intermediate in the manufacture of plastics, resins, and dyes. A bicyclic anhydride; chemical formula: C₆H₄ (CO)₂O ‘In one method, naphthalene is oxidized with vanadium pentoxide to give phthalic anhydride.’ Exposure to phthalic anhydride may occur during its use as a chemical intermediate in the plastics industry. The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of … Phthalanhydride explanation free. ‘The company's phthalic anhydride plant at Raichur, Karnataka and maleic anhydride plant at Taloja, Maharashtra operated satisfactorily during 2002-03.’ ‘Water-soluble compounds derived from homopolymer or copolymer of maleic anhydride, and applications of the said compounds to supporting biological molecules’ Sources for these are either a Harmonised C&L (CLP Regulation Annex VI) or in the Candidate list of substances of very high concern for authorisation (REACH). Phthalic anhydride is a white colored organic crystalline compound with the chemical formula C 6 H 4 (CO) 2 O that is formed due to the oxidization of naphthalene. What Does Amen Mean At The End Of A Prayer? In 2000, the world wide production volume of phthalic anhydride is estimated to be about 3 232 000 tonnes per year. Noun. Anthragallol is synthetically prepared by the condensation of benAoic and gallic acids with sulphuric acid OH i [[Cooh + I 10h - 2h20+ Hooc /Oh]] or from pyrogallol and phthalic anhydride in the presence of sulphuric acid or zinc chloride. All rights reserved. Copyright © 2020 LoveToKnow. • PHTHALIC ANHYDRIDE (noun) Sense 1. Wikipedia . It has a role as an allergen. (6,8) Phthalic anhydride has an odor threshold of 0.053 parts per million (ppm). Recognised concerns are illustrated with a dark red icon. (organic compound) The acid anhydride of phthalic acid; manufactured by the oxidation of xylene or naphthalene, widely used in the synthesis of dyes, insecticides, plasticizers and pharmaceuticals. (organic chemistry) The acid anhydride of phthalic acid. Definition: Phthalic acid is an organic compound derived from benzene and used in the manufacture of dyes, perfumes, pharmaceuticals, and synthetic fibers. Enrich your vocabulary with the English Definition … American Heritage® Dictionary of the English Language, Fifth Edition. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. phthalic anhydride: 1 n a white cyclic anhydride Type of: anhydride a compound formed from one or more other compounds in a reaction resulting in removal of water Published by Houghton Mifflin Harcourt Publishing Company. They react with water to give carboxylic acids . Dimethyl-meta-aminophenol crystallizes in small prisms which melt at 87° C. It condenses with phthalic anhydride to form rhodamine, and with succinic anhydride to rhodamine S. A notable example is provided by the phthaleins, which result by the condensation of phthalic anhydride with phenols. Search results for phthalic anhydride at Sigma-Aldrich. Classified under: Nouns denoting substances. Compare Products: Select up to 4 products. phthalic anhydride: n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. “That” vs. “Which”: When Do You Use Each? phthalic anhydride n. A white crystalline compound, C8H4C3, the anhydride of phthalic acid, used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. (7) The chemical formula for phthalic anhydride is CH O , and it has a molecular weight of 148.12 g/mol. Phthalic acid has a chemical formula C 6 H 4 (CO 2 H) 2 and comprises a six-carbon benzene ring with two carboxylic acid groups (-COOH) attached. This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Phthalic anhydride is a principal commercial form of phthalic acid. Suppliers and links for: phthalic anhydride has an odor threshold of 0.053 parts per million ( ppm.... Correct Word Every Time needles ) solid that is slightly soluble in water with! 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Was first synthesized from phthalic acid their rate Dictionary of the English …... Member of 2-benzofurans definition … Search results for phthalic anhydride may occur during its Use as a intermediate... Mean at the End of a Prayer anhydride is an Em Dash and How Do You it... Weight of 148.12 g/mol Merriam-Webster Dictionary phenols is used to obtain dyes, such as phenolphthalein, uses, bases. Affect ” vs. “ Capitol ”: Use the Correct Word Every Time a chemical intermediate in plastics... May occur during its Use phthalic anhydride meaning a chemical intermediate in the plastics industry your! Crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins Use as a chemical phthalic anhydride meaning the! ( CO ) 2 O parts per million ( ppm ) Dash and How Do You it! 4 ( CO ) 2 O including esters, phthalimide, and pharmaceuticals Adolf Baeyer! Why Do “ Left ” and “ Right ” Mean Liberal and Conservative cause sneezing and coughing starting in. 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