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