Published by Houghton Mifflin Company. Enrich your vocabulary with the English Definition … Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Learn definitions, uses, and phrases with phthalic. PHTHALIC ANHYDRIDE reacts exothermically with water. Phthalic anhydride definition: white crystalline substance used mainly in producing dyestuffs | Meaning, pronunciation, translations and examples Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. Noun . Compare Products: Select up to 4 products. Meaning: A white cyclic anhydride. Phthalic anhydride is the anhydride of phthalic acid. phthalic anhydride. Phthalic is contained in 2 matches in Merriam-Webster Dictionary. • PHTHALIC ANHYDRIDE (noun) Sense 1. Phthalic anhydride (PA) is the dominant saturated dibasic acid used in the manufacture of polyesters. Phthalanhydride explanation free. “That” vs. “Which”: When Do You Use Each? Phthalimide is the organic compound with the formula C 6 H 4 (CO) 2 NH. Phthalic definition, of or derived from phthalic acid. THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION … 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. They react with water to give carboxylic acids . Formula: C. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. 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 Wikipedia . “Affect” vs. “Effect”: Use The Correct Word Every Time. Definition: Phthalic acid is an organic compound derived from benzene and used in the manufacture of dyes, perfumes, pharmaceuticals, and synthetic fibers. (7) The chemical formula for phthalic anhydride is CH O , and it has a molecular weight of 148.12 g/mol. It reacts exothermically when in contact with water and as such can accelerate … n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of … Noun. phthalic anhydride: n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. The Most Surprisingly Serendipitous Words Of The Day. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. In 2000, the world wide production volume of phthalic anhydride is estimated to be about 3 232 000 tonnes per year. Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. All rights reserved. What Is An Em Dash And How Do You Use It? The Dictionary.com Word Of The Year For 2020 Is …. If your language skills aren’t already top-notch, then this vocab quiz can get you up to speed! Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. Chemical formula: C … Definition of Phthalic anhydride. The American Heritage® Science Dictionary The reactions are sometimes slow, but can become violent when local heating accelerates their rate. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins 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. It has a role as an allergen. Classified under: Nouns denoting substances. 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 “Capital” vs. “Capitol”: Do You Know Where You’re Going? phthalic anhydride A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. ... Phthalic anhydride . Phthalic anhydride is an important starting product in the manufacture of various phthalic-acid derivatives, including esters, phthalimide, and phthalonitrile. ... phthalic anhydride. It was the first anhydride of a dicarboxylic acid to be used commercially. It is presently obtained by catalytic oxidation of ortho–xylene or naphthalene. ¹ *Please select more than one item to compare It is an important industrial chemical used in the production of plasticizers, dyestuffs, and pharmaceuticals. 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 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. Pronunciation of phthalic anhydride with 1 audio pronunciation, 1 synonym, 1 meaning, 11 translations and more for phthalic anhydride. acid anhydride (plural acid anhydrides) ( organic chemistry ) A class of organic compounds having two acyl groups bonded to the same oxygen atom . The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. Why Do “Left” And “Right” Mean Liberal And Conservative? Structure, properties, spectra, suppliers and links for: Phthalic anhydride, 85-44-9. How to say phthalic anhydride in English? Acids accelerate the reaction with water. 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. 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. 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) 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. (organic chemistry) The acid anhydride of phthalic acid. anhydride definition in English dictionary, anhydride meaning, synonyms, see also 'acetic anhydride',acid anhydride',acyl anhydride',phthalic anhydride'. 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 a white, crystalline, slightly water-soluble solid, C, a white crystalline substance used mainly in producing dyestuffs. We Asked, You Answered. What is Phthalanhydride? 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 Phthalic anhydride is the organic compound with the formula C 6 H 4 (CO) 2 O. 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). This compound is classified as an odorless and tasteless mild organic acid; inhaling this substance may cause sneezing and coughing. : a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins. A crystalline compound made by oxidizing naphthalene, used as an intermediate in the manufacture of plastics, resins, and dyes. 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. The pale yellow crystal of phenolphthalein was first synthesized from phthalic anhydride and phenol in 1871 by Adolf von Baeyer, a German chemist. Phthalic anhydride is an organic compound, the anhydride of phthalic acid. Phthalic anhydride is a white (lustrous needles) solid that is slightly soluble in water. 1. Looking for online definition of Phthalanhydride in the Medical Dictionary? Meaning of Phthalanhydride medical term. 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. (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. Dorp (Ber.,1874,7,P.578) obtained orthobenzoyl benzoic acid by heating phthalic anhydride with benzene in the presence of aluminium chloride. This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. phthalic anhydride n (Elements & Compounds) a white crystalline substance used mainly in producing dyestuffs. phthalic anhydride. A bicyclic anhydride; chemical formula: C₆H₄ (CO)₂O ‘In one method, naphthalene is oxidized with vanadium pentoxide to give phthalic anhydride.’ Search results for phthalic anhydride at Sigma-Aldrich. 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. Published by Houghton Mifflin Harcourt Publishing Company. Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. Describe 2020 In Just One Word? Copyright © 2011. American Heritage® Dictionary of the English Language, Fifth Edition. Phthalic anhydride can … 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. Phthalic anhydride is a principal commercial form of phthalic acid. Exposure to phthalic anhydride may occur during its use as a chemical intermediate in the plastics industry. ‘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’ Definition of phthalic anhydride. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans. This colorless solid is an important industrial chemical, especially for the large–scale production of plasticizers for plastics. "Recognised" - meaning that the concern is indicated in an official source. What Does Amen Mean At The End Of A Prayer? See more. Copyright © 2020 LoveToKnow. All Rights Reserved. The production of plasticizers for plastics and bases 7 ) the chemical formula for anhydride. World wide production volume of phthalic acid Mifflin Company Dictionary.com Word of the English,... An odorless and tasteless mild organic acid ; inhaling this substance may cause sneezing and coughing benzene in manufacture. Solid, C, a German chemist, 2001, 1995 by Houghton Mifflin.! ’ re Going, 1995 by Houghton Mifflin Company 6,8 ) phthalic is. Dicarboxylic acid to be about 3 232 000 tonnes per year anhydride is the anhydride of anhydride... That the concern is indicated in an official source with the formula 6! Compounds ) a white crystalline substance used mainly in producing dyestuffs phthalic acid.This colourless solid is important! 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