Phthalic anhydride is a white (lustrous needles) solid that is slightly soluble in water. "Recognised" - meaning that the concern is indicated in an official source. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins (organic chemistry) The acid anhydride of phthalic acid. Recognised concerns are illustrated with a dark red icon. All Rights Reserved. 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. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. 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. They react with water to give carboxylic acids . Phthalanhydride explanation free. In 2000, the world wide production volume of phthalic anhydride is estimated to be about 3 232 000 tonnes per year. Dorp (Ber.,1874,7,P.578) obtained orthobenzoyl benzoic acid by heating phthalic anhydride with benzene in the presence of aluminium chloride. phthalic anhydride. Definition of phthalic anhydride. “Capital” vs. “Capitol”: Do You Know Where You’re Going? 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® Science Dictionary “Affect” vs. “Effect”: Use The Correct Word Every Time. “That” vs. “Which”: When Do You Use Each? : a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins. Wikipedia . *Please select more than one item to compare acid anhydride (plural acid anhydrides) ( organic chemistry ) A class of organic compounds having two acyl groups bonded to the same oxygen atom . ... 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. Looking for online definition of Phthalanhydride in the Medical Dictionary? It has a role as an allergen. The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. Learn definitions, uses, and phrases with phthalic. n. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of … Phthalic anhydride definition: white crystalline substance used mainly in producing dyestuffs | Meaning, pronunciation, translations and examples 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 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 THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION … Phthalic is contained in 2 matches in Merriam-Webster Dictionary. ... Phthalic anhydride . A bicyclic anhydride; chemical formula: C₆H₄ (CO)₂O ‘In one method, naphthalene is oxidized with vanadium pentoxide to give phthalic anhydride.’ a white, crystalline, slightly water-soluble solid, C, a white crystalline substance used mainly in producing dyestuffs. Search results for phthalic anhydride at Sigma-Aldrich. American Heritage® Dictionary of the English Language, Fifth Edition. A crystalline compound made by oxidizing naphthalene, used as an intermediate in the manufacture of plastics, resins, and dyes. (7) The chemical formula for phthalic anhydride is CH O , and it has a molecular weight of 148.12 g/mol. 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) This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Classified under: Nouns denoting substances. It reacts exothermically when in contact with water and as such can accelerate … Compare Products: Select up to 4 products. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Chemical formula: C … Formula: C. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes. Definition: Phthalic acid is an organic compound derived from benzene and used in the manufacture of dyes, perfumes, pharmaceuticals, and synthetic fibers. Published by Houghton Mifflin Harcourt Publishing Company. How to say phthalic anhydride in English? phthalic anhydride n (Elements & Compounds) a white crystalline substance used mainly in producing dyestuffs. Phthalic anhydride is an important starting product in the manufacture of various phthalic-acid derivatives, including esters, phthalimide, and phthalonitrile. Phthalic anhydride is an organic compound, the anhydride of phthalic acid. 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 See more. phthalic anhydride. Pronunciation of phthalic anhydride with 1 audio pronunciation, 1 synonym, 1 meaning, 11 translations and more for phthalic anhydride. Published by Houghton Mifflin Company. What Is An Em Dash And How Do You Use It? 1. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. 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. A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Noun. Phthalimide is the organic compound with the formula C 6 H 4 (CO) 2 NH. The Most Surprisingly Serendipitous Words Of The Day. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans. The American Heritage® Stedman's Medical Dictionary 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. Phthalic anhydride can … This compound is classified as an odorless and tasteless mild organic acid; inhaling this substance may cause sneezing and coughing. Enrich your vocabulary with the English Definition … What is Phthalanhydride? 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). ¹ The Dictionary.com Word Of The Year For 2020 Is …. All rights reserved. Meaning: A white cyclic anhydride. Copyright © 2020 LoveToKnow. Phthalic anhydride is a principal commercial form of phthalic acid. The pale yellow crystal of phenolphthalein was first synthesized from phthalic anhydride and phenol in 1871 by Adolf von Baeyer, a German chemist. The reactions are sometimes slow, but can become violent when local heating accelerates their rate. Structure, properties, spectra, suppliers and links for: Phthalic anhydride, 85-44-9. Noun . 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. (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. Acids accelerate the reaction with water. 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. Exposure to phthalic anhydride may occur during its use as a chemical intermediate in the plastics industry. PHTHALIC ANHYDRIDE reacts exothermically with water. Phthalic anhydride is the organic compound with the formula C 6 H 4 (CO) 2 O. Benzoic acid by heating phthalic anhydride with phenols is used to obtain dyes, such as.! O, and phthalonitrile English definition … Search results for phthalic anhydride is an industrial... Fifth Edition Dictionary of the English Language, Fifth phthalic anhydride meaning is CH,! Of aluminium chloride volume of phthalic acid with the English Language, Fifth Edition phthalic anhydride meaning, uses, and with! Yellow crystal of phenolphthalein was first synthesized from phthalic anhydride is a commercial. 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