© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins In 2000, the world wide production volume of phthalic anhydride is estimated to be about 3 232 000 tonnes per year. Phthalic anhydride is the organic compound with the formula C 6 H 4 (CO) 2 O. The Dictionary.com Word Of The Year For 2020 Is …. Chemical formula: C … ... phthalic anhydride. We Asked, You Answered. ¹ The American Heritage® Stedman's Medical Dictionary It reacts exothermically when in contact with water and as such can accelerate … “Affect” vs. “Effect”: Use The Correct Word Every Time. acid anhydride (plural acid anhydrides) ( organic chemistry ) A class of organic compounds having two acyl groups bonded to the same oxygen atom . Phthalic anhydride (PA) is the dominant saturated dibasic acid used in the manufacture of polyesters. They react with water to give carboxylic acids . n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of … 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. How to say phthalic anhydride in English? Published by Houghton Mifflin Company. phthalic anhydride: n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. Why Do “Left” And “Right” Mean Liberal And Conservative? (6,8) Phthalic anhydride has an odor threshold of 0.053 parts per million (ppm). Noun. Formula: C. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. phthalic anhydride A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Meaning: A white cyclic anhydride. phthalic anhydride n (Elements & Compounds) a white crystalline substance used mainly in producing dyestuffs. • PHTHALIC ANHYDRIDE (noun) Sense 1. Definition of phthalic anhydride. anhydride definition in English dictionary, anhydride meaning, synonyms, see also 'acetic anhydride',acid anhydride',acyl anhydride',phthalic anhydride'. If your language skills aren’t already top-notch, then this vocab quiz can get you up to speed! 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 Phthalic anhydride is a white (lustrous needles) solid that is slightly soluble in water. Classified under: Nouns denoting substances. Phthalic anhydride is an organic compound, the anhydride of phthalic acid. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition What Is An Em Dash And How Do You Use It? The reactions are sometimes slow, but can become violent when local heating accelerates their rate. See more. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans. 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. Published by Houghton Mifflin Harcourt Publishing Company. 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. The pale yellow crystal of phenolphthalein was first synthesized from phthalic anhydride and phenol in 1871 by Adolf von Baeyer, a German chemist. The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. 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. This colorless solid is an important industrial chemical, especially for the large–scale production of plasticizers for plastics. Phthalanhydride explanation free. 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. 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 1. Phthalic anhydride is an important starting product in the manufacture of various phthalic-acid derivatives, including esters, phthalimide, and phthalonitrile. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. 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 is contained in 2 matches in Merriam-Webster Dictionary. (7) The chemical formula for phthalic anhydride is CH O , and it has a molecular weight of 148.12 g/mol. PHTHALIC ANHYDRIDE reacts exothermically with water. This compound is classified as an odorless and tasteless mild organic acid; inhaling this substance may cause sneezing and coughing. “Capital” vs. “Capitol”: Do You Know Where You’re Going? : a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins. What Does Amen Mean At The End Of A Prayer? Exposure to phthalic anhydride may occur during its use as a chemical intermediate in the plastics industry. Noun . Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Looking for online definition of Phthalanhydride in the Medical Dictionary? It was the first anhydride of a dicarboxylic acid to be used commercially. "Recognised" - meaning that the concern is indicated in an official source. Describe 2020 In Just One Word? 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 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. Phthalic anhydride can … Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. 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. 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. Search results for phthalic anhydride at Sigma-Aldrich. Pronunciation of phthalic anhydride with 1 audio pronunciation, 1 synonym, 1 meaning, 11 translations and more for phthalic anhydride. 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. A crystalline compound made by oxidizing naphthalene, used as an intermediate in the manufacture of plastics, resins, and dyes. 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. American Heritage® Dictionary of the English Language, Fifth Edition. Phthalic anhydride is the anhydride of phthalic acid. A bicyclic anhydride; chemical formula: C₆H₄ (CO)₂O ‘In one method, naphthalene is oxidized with vanadium pentoxide to give phthalic anhydride.’ All rights reserved. a white, crystalline, slightly water-soluble solid, C, a white crystalline substance used mainly in producing dyestuffs. 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 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’ Recognised concerns are illustrated with a dark red icon. Wikipedia . This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Compare Products: Select up to 4 products. Phthalic anhydride is a principal commercial form of phthalic acid. Copyright © 2020 LoveToKnow. (organic chemistry) The acid anhydride of phthalic acid. Phthalic anhydride definition: white crystalline substance used mainly in producing dyestuffs | Meaning, pronunciation, translations and examples Copyright © 2011. 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) *Please select more than one item to compare Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. What is Phthalanhydride? THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION … Learn definitions, uses, and phrases with phthalic. Definition: Phthalic acid is an organic compound derived from benzene and used in the manufacture of dyes, perfumes, pharmaceuticals, and synthetic fibers. “That” vs. “Which”: When Do You Use Each? 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. The American Heritage® Science Dictionary Definition of Phthalic anhydride. phthalic anhydride. Phthalic definition, of or derived from phthalic acid. It is an important industrial chemical used in the production of plasticizers, dyestuffs, and pharmaceuticals. Phthalimide is the organic compound with the formula C 6 H 4 (CO) 2 NH. It has a role as an allergen. Structure, properties, spectra, suppliers and links for: Phthalic anhydride, 85-44-9. Acids accelerate the reaction with water. Enrich your vocabulary with the English Definition … All Rights Reserved. The Most Surprisingly Serendipitous Words Of The Day. Meaning of Phthalanhydride medical term. It is presently obtained by catalytic oxidation of ortho–xylene or naphthalene. ... Phthalic anhydride . Dorp (Ber.,1874,7,P.578) obtained orthobenzoyl benzoic acid by heating phthalic anhydride with benzene in the presence of aluminium chloride. 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. Affect ” vs. “ Capitol ”: Use the Correct Word Every Time of various derivatives. Where You ’ re Going anhydride may occur during its Use as a chemical intermediate in manufacture... And pharmaceuticals alkyd resins Language skills aren ’ t already top-notch, then this vocab quiz can You. 1 audio pronunciation, 1 synonym, 1 synonym, 1 synonym, 1 meaning, 11 translations more... The american Heritage® Stedman 's Medical Dictionary Copyright © 2002, 2001, by! 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