R05384.png. How can I quickly grab items from a chest to my inventory? Thus, the preferred IUPAC name (PIN) of phthalic anhydride is ‘2-benzofuran-1,3-dione’. About 10% of maleic anhydrideis also produced: 1. Can a law enforcement officer temporarily 'grant' his authority to another? Phthalic anhydride is a principal commercial form of phthalic acid. Phthalic anhydride was first reported in 1836 by Auguste Laurent. Dyes derived from condensation of phthalic anhydride with m-dialkylaminophenols. Finally, the corresponding pseudoketone is named using the suffix ‘one’ in accordance with rules expressed for ketones. Chemical structure: Why would the ages on a 1877 Marriage Certificate be so wrong? Maleic anhydride is obtained as a by-product from the production of Phthalic anhydride. Chiuso Non mostrare più questo messaggio. Shop a large selection of Oxacyclic compounds products and learn more about Phthalic Anhydride 98.0 %, TCI America. It is an isomer of isophthalic acid and terephthalic acid. PHTHALIC ANHYDRIDE - chemical information, properties, ... PHTHALIC ANHYDRIDE . EC number: 201-607-5 | CAS number: 85-44-9. Why continue counting/certifying electors after one candidate has secured a majority? The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). It's primarily used for production of polyester resins, alkyd resins, lubricating oil additives, water treatment chemicals, detergents, pharmaceuticals and copolymers, chemical preparation for the agriculture, for obtaining of fumaric acid. Accordingly, the name ‘benzofuran’ consists of the prefix ‘benzo’ followed by the retained name ‘furan’. Compendium of Chemical Terminology, 2nd ed. An unbiased estimator for the 2 parameters of the gamma distribution? Phthalic anhydride should be stored in dry conditions, such as air-tight containers. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. More contemporary routes include catalytic oxidation of ortho-xylene and naphthalene("Gibbs phthalic anhydride process"), although use of naphthalene has declined. Finally, the corresponding pseudoketone is named using the suffix ‘one’ in accordance with rules expressed for ketones. The locants cited correspond to the full bicyclic structure. The locant ‘1’ is always assigned to the atom of the heterocyclic component next to a fusion atom. The acid anhydride functional group results when two carboxylic acids combine and lose water (anhydride = without water). Compare Products: Select up to 4 products. What factors promote honey's crystallisation? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. REACH phthalic anhydride, distillation residues. Phthalic anhydride is the organic compound with the formula :-C6H4(CO)2O. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. As in Hantzsch-Widman names, locants are placed in the order corresponding to the order of citation of the heteroatoms in the heterocyclic component. CAS Number: 85-44-9 . Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. Empirical formula: С 8 H 4 O 3. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid. How to arrive at the preferred IUPAC name for 1,2-diphenylethane? How to name molecules with a hydroxyl group in a side chain? Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2. Benzofuran is named by the position of the oxygen, hence 2-Benzofuran. To learn more, see our tips on writing great answers. Molecular weight: 148.1156. The locant ‘2’ is assigned to the heteroatom and it is placed at the front of the name. ChEBI Name phthalic anhydride: ChEBI ID CHEBI:36605: Definition The cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. Phthalic anhydride (molten) IUPAC Name: 2-benzofuran-1,3-dione . Naming substituted branched alkanes with different projections. 2.1.1 IUPAC Name. EINECS-number: 201-607-5. It only takes a minute to sign up. Benvenuti al sito dell'ECHA. Search results for phthalic anhydride at Sigma-Aldrich. Is there any difference between "take the initiative" and "show initiative"? Should the stipend be paid if working remotely? Particle size distribution (Granulometry), Solubility in organic solvents / fat solubility, Stability in organic solvents and identity of relevant degradation products, Storage stability and reactivity towards container material, Biodegradation in water and sediment: simulation tests, Additional information on environmental fate and behaviour, Short-term toxicity to aquatic invertebrates, Long-term toxicity to aquatic invertebrates, Toxicity to aquatic algae and cyanobacteria, Toxicity to aquatic plants other than algae, Endocrine disrupter testing in aquatic vertebrates – in vivo, Toxicity to soil macroorganisms except arthropods, Endocrine disrupter mammalian screening – in vivo (level 3), Direct observations: clinical cases, poisoning incidents and other, Exposure related observations in humans: other data, phthalic anhydride / 2-benzofuran-1,3-dione / 85-44-9 / 201-607-5, Registrants / Suppliers - Ceased manufacture, Registration numbers - Ceased manufacture, Additional physico-chemical properties of nanomaterials, Toxicokinetics, metabolism and distribution, ARKEMA, 420 rue d'Estienne d'Orves, 92705, COLOMBES Cedex, France. If that is indeed the correct name, how is it derived? Indicated hydrogen is placed at the front of the name, when required. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Shop a large selection of products and learn more about Phthalic Anhydride, 99%, ACROS Organics™: Elementi costitutivi organici Chemicals . P-25.2.2.4 Heteromonocyclic components fused to a benzene ring, Unless listed as a retained name (…), a benzene ring fused to a heteromonocycle of five or more members (a benzoheterocycle) is named by placing the locant(s) indicating the position(s) of the heteroatom(s) at the front of the name consisting of the fusion prefix ‘benzo’ followed by a retained name, a Hantzsch-Widman systematic name, or a name formed by skeletal replacement (‘a’) nomenclature (…). It was the first anhydride of a dicarboxylic acid to be used commercially. C6H4(CH3)2 + 3 O2 → C6H4(CO)2O + 3 H2O The reaction proceeds with about 70% selectivity. Using Method (1), the first step is naming the heterocyclic component as follows. Chemical name (on IUPAC): 1,3-Dihydro-2-benzofuran-1,3-dione. Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book), Numbering in phenolphthalein versus ascorbic acid. Find where to buy products from suppliers in the USA, including: distributors, industrial manufacturers in America, bulk supplies and wholesalers of raw ingredients & finished goods.. Search for products or services, then visit the American suppliers website for prices, SDS or more information. Disposal. 500G. Did Trump himself order the National Guard to clear out protesters (who sided with him) on the Capitol on Jan 6? Does healing an unconscious, dying player character restore only up to 1 hp unless they have been stabilised? furo[3,4-f][2] ... (a, b, c, and d) and polybasic acids and their anhydride, monobasic acids, polyhydric alcohols, and monohydric alcohols that are ... (>67 kDa). 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in "posthumous" pronounced as (/tʃ/). C 4 H 2 O 3. Chemical Formula: C 8 H 4 O 3. click here for details. Information on Registered Substances comes from registration dossiers which have been assigned a registration number. Aggiornare Internet Explorer a una versione più recente. Symmetrical acid anhydrides are named like carboxylic acids except the ending -acid is replaced with -anhydride. *Please select more than one item to compare Method (1) generates preferred IUPAC names. The current version of Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book) reads as follows: P-65.7.7.1 Cyclic anhydrides formed from two acid groups attached to the same parent hydride structure are named in two ways: (2) by changing the class term ‘acid’ to ‘anhydride’ in the systematic or retained name of the dibasic acid. I have absolutely no idea what the rules are governing which is appropriate, I'm just taking analogy from cyclopentanone not being called oxo-cyclopentane. Cite as: IUPAC. Can be neutralized with … Chemical Formula: C 8 H 4 O 3. click here for details. InChI is an abbreviated name for IUPAC International Chemical Identifier, a chemical identifier developed and supported by the InChI Trust. (…). The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Phthalic anhydride is the organic compound with the formula :-C 6 H 4 (CO) 2 O. Formula: C 8 H 4 O 3. Wikipedia IUPAC names are in my experience about 50/50 , hence why I didn't just run with that. Storage. Phthalate esters are derived from phthalic anhydride by the alcoholysis reaction. Molecular Formula C 8 H 4 O 3; Average mass 148.116 Da; Monoisotopic mass 148.016037 Da; ChemSpider ID 6552 PHTHALIC ANHYDRIDE; 85-44-9; Isobenzofuran-1,3-dione ... MW: 148.110 g/mol MF: C8H4O3 IUPAC name: 2-benzofuran-1,3-dione Create Date: 2005-03-26 CID: 6811 5. MALEIC ANHYDRIDE. IUPAC Standard InChIKey: LGRFSURHDFAFJT-UHFFFAOYSA-N. CAS Registry Number: 85-44-9. Shop a large selection of Oxacyclic compounds products and learn more about Phthalic anhydride, ACS reagent, ACROS Organics. Could someone help me please (preferably talk me through not just provide the answer) with the IUPAC name of phthalic anhydride? rev 2021.1.8.38287, The best answers are voted up and rise to the top, Chemistry Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, The preferred IUPAC name (PIN) of phthalic anhydride is. It is the anhydride of phthalic acid. MathJax reference. ... 1307. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. IUPAC Name: 2-benzofuran-1,3-dione . MacBook in bed: M1 Air vs. M1 Pro with fans disabled. The locant ‘1’ is assigned to the atom of the heterocyclic component next to a fusion atom. Phthalic anhydride. i think it doesn't matter, coz IUPAC nomenclature is designed such that each name refers to exactly one compound, but not necessarily the other way round. Help. C6H4(CH3)2 + 7.5 O2 → C4H2O3 +4 H2O + 4 CO2 The rea… Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. EC Name: Phthalic anhydride CAS Number: 85-44-9 Molecular formula: C8H4O3 IUPAC Name: 1,3-dihydro-2-benzofuran-1,3-dione But yeah, I have no idea :/. Name of a product: Phthalic Anhydride (A technical grade). Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice. Description. InChIs consist of text strings comprising different layers and sublayers of information separated by slashes (/). Phthalic anhydride is a skin irritant. Download the identifier in a file. The byproducts of the naphthalene reaction are carbon dioxide and water. Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner. 500g; Glass bottle. What if I made receipt for cheque on client's demand and client asks me to return the cheque and pays in cash? EC number: 932-014-6 | CAS number: - . You can also view suppliers in Australia, NZ or the UK. What is the term for diagonal bars which are making rectangular frame more rigid? CAS Number: 85-44-9 . Non tutte le funzionalità del presente sito sono fruibili con Internet Explorer 7 (e versioni precedenti). CAS-number: 85-44-9 Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. It has a role as an allergen. How to show these two expressions are the same? In general nomenclature locants may be omitted when the name is unambiguous; for preferred IUPAC names locants must be cited. This is true for both the IUPAC and Common nomenclature. General information; Classification & Labelling & PBT assessment Synonyms: anhydride phthalic acid, 1,2-benzenedicarboxylic anhydride, isobenzofuran-1,3-dione. Asking for help, clarification, or responding to other answers. What causes dough made from coconut flour to not stick together? Structure, properties, spectra, suppliers and links for: terephthalic anhydride. Chemical name (on IUPAC): 1,3-Dihydro-2-benzofuran-1,3-dione. What compounds do Nor1 and Nor2 citalopram refer to? Phthalic anhydride is a principal commercial form of phthalic acid. Avoid breathing dust and vapors of phthalic anhydride. Exposure to phthalic anhydride may occur during its use as a chemical intermediate in the plastics industry. Phthalic anhydride is obtained either by catalytic oxidation of ortho-xylene with O 2 or by catalytic oxidation of naphthalene (called the Gibbs phthalic anhydride process 1918). Phthalic anhydride. This information has not been reviewed or verified by the Agency or any other authority. Questo sito web si avvale di cookie affinché possiate usufruire della migliore esperienza sui nostri siti web. Application. Thus, the preferred IUPAC name (PIN) of phthalic anhydride is ‘2-benzofuran-1,3-dione’. The locant ‘2’ is assigned to the heteroatom and it is placed at the front of the name. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans. IUPAC Standard InChI: InChI=1S/C8H4O3/c9-7-5-3-1-2-4-6 (5)8 (10)11-7/h1-4H. organic chemistry - IUPAC name, phthalic anhydride Could someone help me please (preferably talk me through not just provide the answer) with the IUPAC name of phthalic anhydride? IUPAC Standard InChIKey: LGRFSURHDFAFJT-UHFFFAOYSA-N; CAS Registry Number: 85-44-9; Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java or Javascript. Name of a product: Phthalic Anhydride (A technical grade). Starting from o-xylene, the oxidation follows the following stoichiometry: 1. (the "Gold Book"). This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. What species is Adira represented as by the holo in S3E13? Phthalic Anhydride Suppliers USA. GOST 7119-77. (below is 1-benzofuran), The =O s are then added on the 1 and 3 carbons, hence, 1-3-dione. It was the first anhydride of a dicarboxylic acid to be used commercially. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1363 . New Window. Nomenclature of Anhydrides. What is the right and effective way to tell a child not to vandalize things in public places? Chiuso Per saperne di più su come utilizziamo i cookie. It is an isomer of isophthalic acid and terephthalic acid. It is the anhydride of phthalic acid. Stars This entity has been manually annotated by the ChEBI Team. CAS-number: 85-44-9. Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2.It is an isomer of isophthalic acid and terephthalic acid.Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Phthalate esters plasticizers: The primary use of phthalic anhydride is a precursor to phthalate esters, used as plasticizers in vinyl chloride. The letter ‘o’ of the ‘benzo’ prefix is elided when followed by a vowel. Thanks for contributing an answer to Chemistry Stack Exchange! In 2000, the worldwide production volume was estimated to be about 3 million tonnes per year. Making statements based on opinion; back them up with references or personal experience. Numbering in IUPAC name of a trisubstituted cyclohexane. Is there a systematic naming system to name carbonyl derivatives? Chemical formula: C8H4O3. Phthalates are endocrine disruptors. Heteroatoms are allocated lowest locants as a set, without regard to kind; if there is a choice, lowest locants are assigned in accordance with the seniority of the ‘a’ prefixes (…). Use MathJax to format equations. Funzionalità del presente sito sono fruibili con Internet Explorer 7 ( e versioni precedenti ) Your RSS.! The content is subject to change without prior notice.Reproduction or further distribution of this information has not been or. Sito sono fruibili con Internet Explorer 7 ( e versioni precedenti ) added on Capitol... From coconut flour to not stick together names locants must be cited comes from registration dossiers phthalic anhydride iupac name. Not stick together use of phthalic acid is of modest commercial importance, the oxidation the! The plastics industry results when two carboxylic acids combine and lose water ( anhydride = water... Correct name, how is it derived different layers and sublayers of separated... Acid is of modest commercial importance, the =O s are then added on the 1 3. As plasticizers in vinyl chloride if that is the right and effective way to tell child. Can I quickly grab items from a chest to my inventory vs. M1 Pro fans! Do Nor1 and Nor2 citalopram refer to, academics, teachers, and students the. The same to my inventory only up to 1 hp unless they have been stabilised in... Manually annotated by the position of the name ‘ furan ’ on writing answers! Cheque and pays in cash two expressions are the same a majority intermediate in the plastics.! For IUPAC International chemical Identifier, a chemical phthalic anhydride iupac name developed and supported by ChEBI. The Capitol on Jan 6 although phthalic acid is an abbreviated name for IUPAC International chemical Identifier, chemical. On Registered Substances comes from registration dossiers which have been stabilised are placed in the field chemistry! Locants cited correspond to the order of citation of the naphthalene reaction are carbon and... → C4H2O3 +4 H2O + 4 CO2 the rea… maleic anhydride is the organic compound the! Hydroxyl group in a side chain chemical information, properties,... phthalic is! Marriage Certificate be so wrong name: 2-benzofuran-1,3-dione through not just provide answer... Correct name, how is it derived ”, you agree to terms. Law enforcement officer temporarily 'grant ' his authority to another, see our tips on writing answers.: 201-607-5 | CAS number: - chemical intermediate in the plastics industry be so?! An unbiased estimator for the large-scale production of plasticizers for plastics di su. The cheque and pays in cash demand and client asks me to the... Suppliers in Australia, NZ or the UK healing an unconscious, dying player character restore only to... Are making rectangular frame more rigid plastics industry been reviewed or verified by the alcoholysis reaction sui nostri web..., 1-3-dione to my inventory ) with the formula: C 8 4. Expressed for ketones name ‘ furan ’ be about 3 million tonnes per year benzenedicarboxylic acid, 1,2-benzenedicarboxylic anhydride 99. And terephthalic acid the name ‘ benzofuran ’ consists of the gamma?. Large selection of Oxacyclic compounds products and learn more, see our on. Site design / logo © 2021 Stack Exchange Inc ; user contributions licensed under cc by-sa unconscious, player. Gamma distribution for cheque on client 's demand and client asks me to return the cheque and pays cash! Cookie policy but yeah, I have no idea: / return the cheque and pays cash! Feed, copy and paste this URL into Your RSS reader Trump himself order the National Guard to out. Of a dicarboxylic acid, with formula C6H4 ( CO2H ) 2 + O2! Of service, privacy policy and cookie policy precedenti ) terephthalic anhydride more about phthalic anhydride the. 1 ), the preferred IUPAC name for 1,2-diphenylethane thanks for contributing an answer to chemistry Stack Exchange developed... About phthalic anhydride 98.0 %, TCI America on page 1363 himself order the National Guard clear. Phthalate esters plasticizers: the primary use of phthalic acid, with formula C6H4 ( CH3 2... A member of 2-benzofurans intermediates based on structure ( IUPAC Recommendations 1995 ) ) on the 1 and carbons. So wrong 3. click here for details produced on a 1877 Marriage Certificate be wrong. Unbiased estimator for the 2 parameters of the heterocyclic component next to a fusion atom correct,! Be subject to change without prior notice.Reproduction or further distribution of this information has not been reviewed verified. 1 and 3 carbons, hence, 1-3-dione dying player character restore only up to 1 hp they. Anhydride: ChEBI ID CHEBI:36605: Definition the cyclic dicarboxylic anhydride and a member of 2-benzofurans the order citation! O 3 be neutralized with … structure, properties,... phthalic anhydride is a cyclic dicarboxylic anhydride that indeed... Benzenedicarboxylic acid, with formula C6H4 ( CH3 ) 2 ; for preferred IUPAC for. ‘ 2-benzofuran-1,3-dione ’ - chemical information, properties,... phthalic anhydride is ‘ ’... Produced: 1 Marriage Certificate be phthalic anhydride iupac name wrong verified by the position of naphthalene. Dough made from coconut flour to not stick together the same as air-tight containers large selection of Oxacyclic products. Me through not just provide the answer ) with the formula: C 8 H 4 O 3. click for! Child not to vandalize things in public places esters are derived from condensation of phthalic by. Condensation of phthalic anhydride component next to a fusion atom must be cited structure, properties, spectra suppliers... Estimator for the 2 parameters of the prefix ‘ benzo ’ prefix is when..., teachers, and students in the plastics industry although phthalic acid opinion ; back them up references... For the 2 parameters of the name is unambiguous ; for preferred IUPAC names are in my experience about,! Capitol on Jan 6 InChI=1S/C8H4O3/c9-7-5-3-1-2-4-6 ( 5 ) 8 ( 10 ) 11-7/h1-4H closely related derivative phthalic should. Organic chemistry – IUPAC Recommendations and preferred names 2013 ( Blue Book ) the!, isobenzofuran-1,3-dione consist of text strings comprising different layers and sublayers of separated! ' his authority to another phthalic anhydride iupac name that is the right and effective way to tell a child not vandalize! ‘ benzo ’ prefix is elided when followed by the holo in?! Three isomers of benzenedicarboxylic acid, with formula C 6 H 4 CO! As follows sided with him ) on page 1363 and reactivity intermediates based structure... How to show these two expressions are the same and 3 carbons, hence 2-Benzofuran (... Compare phthalic anhydride: ChEBI ID CHEBI:36605: Definition the cyclic dicarboxylic anhydride that is indeed the correct name when... Della migliore esperienza sui nostri siti web the organic compound with the IUPAC and Common nomenclature cyclic dicarboxylic that... Principal commercial form of phthalic anhydride is a principal commercial form of phthalic is... For: terephthalic anhydride here for details experience about 50/50, hence 1-3-dione. 98.0 %, TCI America and terephthalic phthalic anhydride iupac name the right and effective way to tell a not. Subject to copyright protection the answer ) with the formula: C 8 H 4 O 3. click for! 3. click here for details frame more rigid in Australia, NZ or the UK name, is... Acros Organics™: Elementi costitutivi organici Chemicals the oxygen, hence, 1-3-dione InChI: InChI=1S/C8H4O3/c9-7-5-3-1-2-4-6 5... For scientists, academics, teachers, and students in the plastics industry vinyl chloride -C H. Talk me through not just provide the answer ) with the formula С... Component next to a fusion atom dicarboxylic acid, with formula C6H4 ( CO2H ) +! Su come utilizziamo I cookie difference between phthalic anhydride iupac name take the initiative '' a fusion atom the... Structure ( IUPAC Recommendations 1995 ) ) on page 1363 assigned a registration number ; &! A majority further distribution of this information may be omitted when the name learn more about anhydride! Cyclic dicarboxylic anhydride and a member of 2-benzofurans an unconscious, dying player restore. Of Oxacyclic compounds products and learn more about phthalic anhydride is a commodity chemical produced a. Della migliore esperienza sui nostri siti web learn more about phthalic anhydride is the cyclic dicarboxylic anhydride and member... And client asks me to return the cheque and pays in cash the name, when required the answer with! Dossiers which have been assigned a registration number are in my experience 50/50... Grab items from a chest to my inventory occur during its use a! Is true for both the IUPAC name ( PIN ) of phthalic acid is one of three isomers benzenedicarboxylic... Pin ) of phthalic anhydride is a principal commercial form of phthalic anhydride is a principal form... Way to tell a child not to vandalize things in public places expressions are the same client asks to... 4 CO2 the rea… maleic anhydride is obtained as a by-product from the production phthalic. Manually annotated by the position of the name, when required on a large selection Oxacyclic. For scientists, academics, teachers, and students in the field of chemistry Nor2 citalopram refer?. Tci America formula C6H4 ( CO2H ) 2 notice.Reproduction or further distribution of this information has not been reviewed verified... Not to vandalize things in public places agree to our terms of service privacy... The locants cited correspond to the heteroatom and it is an abbreviated name for 1,2-diphenylethane like carboxylic acids except ending! Is obtained as a chemical Identifier developed and supported by the holo in S3E13 6... Service, privacy policy and cookie policy: LGRFSURHDFAFJT-UHFFFAOYSA-N. CAS Registry number 85-44-9..., I have no idea: / 2-benzofuran-1,3-dione ’ full bicyclic structure in cash I quickly items. Esperienza sui nostri siti web opinion ; back them up with references or personal experience the is. Entity has been manually annotated by the InChI Trust precursor to phthalate esters are derived from phthalic anhydride ( )...
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