phthalic anhydride formula

Properties. It was the first anhydride of a dicarboxylic acid to be used commercially. ], Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily, NIOSH REL : TWA 6 mg/m 3 (1 ppm) OSHA PEL ? Phthalic anhydride has another major use in the production of polyester resins and other minor uses in the production of alkyd resins used in paints and lacquers, certain guys, insect repellents, and urethane polyester polyols. [7] Phthalic anhydride is a degradation product of CAP.[8]. The product stream is then processed in switch condenser for separation of condensable from non-condensable. Phthalic anhydride has also been used as a rubber scorch inhibitor and retarder. IUPAC Standard InChI: InChI=1S/C8H4O3/c9-7-5-3-1-2-4-6 (5)8 (10)11-7/h1-4H. Disposal. Principle: Here a modified Friedel-crafts acylation reaction is occurring. Phthalic anhydride vapour, fume or dust is a primary irritant. Synonym: 4,4′-Carbonyldiphthalic anhydride Empirical Formula (Hill Notation): C 17 H 6 O 7. Phthalic anhydride. 4-Nitro-2-benzofuran-1,3-dione. Now-a-days, modern plants have a liquid condenser, a pre-condenser to switch condenser. In 2000, the world wide production volume was estimated to be about 3 million tonnes per year.[1]. [6], Phthalic anhydride treated with cellulose acetate gives cellulose acetate phthalate (CAP), a common enteric coating excipient that has also been shown to have antiviral activity. Formula: C8h4o3. }}, {{#invoke:Citation/CS1|citation This page was last edited on 15 December 2014, at 19:56. Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. ; Durant, J.L. Molecular formula. Name of a product: Phthalic Anhydride (A technical grade). Phthalate plasticizers are used for the production of flexible PVC products such as cables, pipes and hoses, leather cloth, shoes, film for packaging etc. Molecular Weight: 322.23. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. If such information is available in ECHA’s database and is it not claimed confidential, the molecular formula and molecular structure will be displayed here. It is the anhydride of phthalic acid. Phthalic anhydride is a precursor to a variety of reagents useful in organic synthesis. Air concentrations of 25 mg/m3 (4 ppm) produced signs of mucous membrane irritation. Predicted data is generated using the US Environmental Protection Agency’s EPISuite™. It has a role as an allergen. Synonym: 4,4′-Carbonyldiphthalic anhydride Empirical Formula (Hill Notation): C 17 H 6 O 7. Chiral alcohols form half-esters (see above), and these derivatives are often resolvable because they form diastereomeric salts with chiral amines such as brucine. }}, https://en.formulasearchengine.com/index.php?title=Phthalic_anhydride&oldid=228855. [2] Hydrolysis of anhydrides is not typically a reversible process. Coughing, choking, burning sensation in the nose and throat, as well as headache and dizziness can occur. : 85-44-9. Important derivatives include phthalimide and its many derivatives. Empirical formula: С 8 H 4 O 3. • Switch Condensers : TWA 12 mg/m 3 (2 ppm). Phthalic anhydride is the anhydride of phthalic acid. Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. 3-Nitrophthalic anhydride. ; Cass, G.R., Human cell mutagenes in respirable airborne particles from the Northeastern United States. Starting from o-xylene, the oxidation follows the following stoichiometry: The reaction proceeds with about 70% selectivity. Hydrolysis by hot water forms ortho-phthalic acid. Phthalic anhydride can also be prepared from phthalic acid:[1] Molecular Weight: 322.23. c1ccc2c(c1)C(=O)OC2=O Phthalic Anhydride (PA) is being produced by oxidation of Ortho-xylene. A wide variety of phthalic anhydride options are available to you, such as syntheses material intermediates, dyestuff intermediates. phthalic anhydride/ethylenediamine molar ratio of 1:1 gave the highest yield of product I. Appearance: Powder. About 10% of maleic anhydride is also produced: The reaction is catalyzed by a vanadium pentoxide (V2O5) between 320 - 400 °C. Molecular Formula. Phthalic anhydride is a principal commercial form of phthalic acid. ; Taghizadeh, K.; Hemond, H.F.; Lafleur, A.L. CopyCopied, CSID:6552, http://www.chemspider.com/Chemical-Structure.6552.html (accessed 23:06, Jan 8, 2021) Phthalic anhydride and maleic anhydride are commonly used in paints, varnishes and various plastic coatings. White lustrous needles or flakes, free flowing, and free from dirt and other impurities. Benzene • November 2020 • 418,- €/t (+65) Para-Xylene (PX) • November 2020 • 510,- €/t (-5) Ortho-Xylene (OX) • November 2020 • 550,- €/t (-10) Technol., 39(24), 2005, 9547-9560. ass: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 5 K/min; Start T: 50 C; End T: 280 C; End time: 10 min; Start time: 0.5 min; CAS no: 85449; Active phase: HP-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Guillen, M.D. IUPAC … Phthalic anhydride reacts violently with CuO at elevated temperatures [Park, Chang-Man, Richard J. Sheehan. [1] In the 1980s, approximately 6.5×109 kg of these esters were produced annually, and the scale of production was increasing each year, all from phthalic anhydride. Phthalic anhydride (A technical grade) is manufactured from ortho … It was the first anhydride of a dicarboxylic acid to be used commercially. This colorless solid is an important industrial chemical, especially for the large–scale production of plasticizers for plastics. Molecular Formula C 8 H 4 O 3; Average mass 148.116 Da; Monoisotopic mass 148.016037 Da; ChemSpider ID 6552 It increases the electrophilicity of pthalic anhydride in the first step, and facilitates the elimination of the hydroxyl groups. Can be neutralized with … 2. Quality: Industrial. • Catalyst packed bed reactor The phthalic anhydride is separated from byproducts by a series of "switch condensers". Chemical formula: C8H4O3. Purity % m/m Phthalic Anhydride 99,5 (Min) Phthalic anhydride is a white (lustrous needles) solid that is slightly soluble in water. Formula: C 8 H 4 O 3. The major outlet for phthalic anhydride (PA), accounting for just over half of production, is in the manufacture of phthalate plasticisers, the main product being dioctyl phthalate (DOP) which is used as a plasticiser in polyvinyl chloride (PVC). CopyCopied, Validated by Experts, Validated by Users, Non-Validated, Removed by Users, Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, Predicted data is generated using the US Environmental Protection Agency’s EPISuite™, Click to predict properties on the Chemicalize site, For medical information relating to Covid-19, please consult the. "Phthalic Acids and Other Benzenepolycarboxylic Acids" Kirk-Othmer Encyclopedia of Chemical Technology. |CitationClass=book There are 12 phthalic anhydride suppliers, mainly located in Asia. Appearance. John Wiley & Sons, Inc. 2005]. Phthalic anhydride. From Wikipedia, the free encyclopedia Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2. Peter M. Lorz, Friedrich K. Towae, Walter Enke, Rudolf Jäckh, Naresh Bhargava, Wolfgang Hillesheim "Phthalic Acid and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry, 2007, Wiley-VCH, Weinheim. CAS No. 4-nitroisobenzofuran-1,3-dione. Isophthalic acid and trimellitic anhydride are made from m ‐xylene and pseudocumene respectively using the same process. Phthalic anhydride is a principal commercial form of phthalic acid. Henan Sinowin Chemical Industry Co., Ltd. Henan ISO 9001, ISO 9000, ISO 20000. Suppliers with verified business licenses. Other names: 1,3-Isobenzofurandione; ESEN; Phthalandione; Phthalic acid anhydride; Retarder AK; Retarder ESEN; Retarder PD; TGL 6525; Vulkalent B/C; 1,2-Benzenedicarboxylic anhydride; 1,3-Phthalandione; 1,2-Benzenedicarboxylic acid anhydride; ... By formula: C 6 H 7 N + C 8 H 4 O 3 = C 14 H 11 NO 3. 1,2-Benzenedicarboxylic anhydride, PAN, Phthalic acid anhydride White solid (flake) or a clear, colorless, mobile liquid (molten) with a characteristic, acrid odor. Storage. It reacts with strong oxidants and violently on heating with copper oxide or sodium nitrite, causing explosion hazard. [5], Phthalic anhydride is widely used in industry for the production of certain dyes. Phthalic anhydride is the organic compound with the formula C 6 H 4 (CO) 2 O. Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and cheaply available. The cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. Phthalic anhydride reaction on human health is generally an asthma-rhinitis-conjunctivitis syndrome or a delayed reaction and influenza-like symptoms and with increased Immunoglobulin (Immunoglobulin E, Immunoglobulin G ) levels in the blood. Phthalic anhydride is a principal commercial form of phthalic acid. The top supplying country or region is South Korea, which supply 100% of phthalic anhydride … PHTHALIC ANHYDRIDE ( EX GERMISTON ) Chemical name 1,3 - isobenzofurandione. Quantity Value CopyCopied, InChI=1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H The condensate from this series of condensers is sent to a series of distillation column for effective separation of phthalic anhydride from water and maleic anhydride. Phthalic anhydride has another major use in the production of polyester resins and other minor uses in the production of alkyd resins used in paints and lacquers; certain dyes (anthraquinone, phthalein, rhodamine, phthalocyanine, fluorescin, and xanthene dyes); insect repellents; and polyester polyols for polyurethanes. Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. The process begins with the reaction of phthalic anhydride with alcohols, giving the monoesters: The second esterification is more difficult and requires removal of water: The most important diester is bis(2-ethylhexyl) phthalate ("DEHP"), used in the manufacture of polyvinyl chloride. Download the identifier in a file. It is the anhydride of phthalic acid. The most probable human exposure to phthalic anhydride is through skin contact or inhalation during manufacture or use. Name of a product: Phthalic Anhydride (A technical grade). It is an isomer of isophthalic acid and terephthalic acid. It is a organic compound and a important chemical raw material. Extreme care must be taken, that the operating temperature of liquid condenser is above the triple point. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans. It is also utilized as a rubber scorch inhibitor and retarder. A well-known application of this reactivity is the preparation of the anthroquinone dye quinizarin by reaction with para-chlorophenol followed by hydrolysis of the chloride. This reaction is a series of electrophilic aromatic substitutions, with hydroxyl leaving groups picking up protons by Lewis acid catalysis. CAS Number: 2421-28-5 ass: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 6 K/min; Start T: 50 C; End T: 310 C; End time: 10 min; Start time: 1.5 min; CAS no: 85449; Active phase: HP-5; Carrier gas: Helium; Phase thickness: 0.25 um; Data type: Lee RI; Authors: Pedersen, D.U. Avoid breathing dust and vapors of phthalic anhydride. It was the first anhydride of a dicarboxylic acid to be used commercially. Phthalate esters, which function as plasticizers, are derived from Phthalic Anhydride. Chemical name (on IUPAC): 1,3-Dihydro-2-benzofuran-1,3-dione. Synonyms: anhydride phthalic acid, 1,2-benzenedicarboxylic anhydride, isobenzofuran-1,3-dione. Phthalic anhydride is a skin irritant. Chemsrc provides Phthalic anhydride(CAS#:85-44-9) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Molecular Mass 148.11. Studies show that exposure to phthalic anhydride can cause rhinitis, chronic bronchitis, and asthma. Phthalic anhydride (PA) occurs as white solid in various forms or clear molten liquid, with an irritating odour. Type: Phthalic Anhydride. |CitationClass=journal It is the anhydride of phthalic acid. It is the anhydride of phthalic acid. In non-aqueous media product II was obtained with notably lo wer yields (betw een 25.5 and 36.4 %), even a t higher temper atur es and longer reaction times. EINECS-number: 201-607-5. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. Log Octanol-Water Partition Coef (SRC): Log Kow (KOWWIN v1.67 estimate) = 3.30 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42): Boiling Pt (deg C): 474.47 (Adapted Stein & Brown method) Melting Pt (deg C): 188.43 (Mean or Weighted MP) VP(mm Hg,25 deg C): 2.35E-009 (Modified Grain … Articles of Phthalic anhydride are included as well. Sci. 1,3-Isobenzofurandione, 4-nitro-. Chemical name (on IUPAC): 1,3-Dihydro-2-benzofuran-1,3-dione. 85-44-9 EINECS-No. Acid anhydrides are also used as plasticizers for PVC and other plastics, especially where temperature stability is required, as for example in coatings for wires and cables. The reactant stream of o-xylene and air mixture enters the packed bed reactor at a temperature of 300-420 ⁰C and a pressure slightly less than 1 atm. PHTHALIC ANHYDRIDE Chemical Formula : C6H4 (CO)2O Molecular weight : 148.1 CAS Registry Number : 85-44-9 Molecular Structure : Reach Registration Number: 01 – 2119457017 - 41 - 0010 Description: Phthalic Anhydride is an important aromatic di-carboxylic acid anhydride… {{#invoke:citation/CS1|citation (6,8) Phthalic anhydride has an odor threshold of 0.053 parts per million (ppm).

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