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