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phthalic acid to phthalic anhydride

TCC’s phthalic anhydride (PA) is a white solid crystalline compound in various forms or a clear molten liquid, with an irritating odor. The following filters may also be used: N99, R99, P99, N100, R100, P100. Phthalic acid is used mainly in the form of the anhydride to produce other chemicals such as dyes, perfumes, saccharin, phthalates and many other useful products. Phthalic anhydride ACS reagent, ≥99% CAS Number 85-44-9. 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. Saving Lives, Protecting People, The National Institute for Occupational Safety and Health (NIOSH), National Institute for Occupational Safety and Health, A – NIOSH Potential Occupational Carcinogens, B – Thirteen OSHA-Regulated Carcinogens, D – Substances with No Established RELs, E – OSHA Respirator Requirements for Selected Chemicals, G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect, Type C & CE – Definitions for Type C and Type CE Respirators, U.S. Department of Health & Human Services. Up to 30 mg/m3: (APF = 5) Any quarter-mask respirator. PubChem Substance ID … & Ind. Go To: Top, References, Notes Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A.All rights reserved. It is used as an indicator of acid-base titration. *, Up to 60 mg/m3: (APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The para isomer, terephthalic acid, is also used to make polymers—namely, polyesters (see below Derivatives of carboxylic acids: Carboxylic esters). Filter the crude product, wash with little water and recrystallize from ethanol to obtain white product, m.p. 20:790. Phthalic anhydride is the principal commercial form of phthalic acid and it is presently manufactured by catalytic air oxidation of o-xylene or naphthalene. Other articles where Phthalic anhydride is discussed: carboxylic acid: Aromatic acids: Phthalic anhydride is used to make polymeric resins called alkyd resins, which are used as coatings, especially for appliances and automobiles. PHTAN) is the anhydride of phthalic acid. However, the pr oducts of the r eaction can be comple x mainl y due to the fact that both phthalic anhydride and ethylenediamine, the The following filters may also be used: N99, R99, P99, N100, R100, P100. Phenol is heated with phthalic anhydride in presence of conc. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. carboxylic acid: Aromatic acids. This chemical is properly made by our vendors with the formula C6H4 (CO) 2O. Remove the flame and allow cooling. Empirical Formula (Hill Notation) C 8 H 4 O 3. Phthalic anhydride can also be prepared from phthalic acid. Phthalic anhydride is the organic compound with the formula :-C6H4(CO)2O. Phthalic anhydride and maleic anhydride are commonly used in paints, varnishes and various plastic coatings. The product is phenolphthalein. …aromatic dicarboxylic acids are called phthalic, isophthalic, and terephthalic acid, for the ortho, meta, and para isomers, respectively. Undergoes exothmeric nitration with fuming nitric acid-sulfuric acid and may give mixtures of the potentially explosive phthaloyl nitrates or nitrites or their nitro derivatives [Chem. Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(COOH)2. Important additional information about respirator selection, 1,2-Benzenedicarboxylic anhydride, PAN, Phthalic acid anhydride. Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus. Phthalic anhydride. This colorless solid is an important industrial chemical, especially for the large–scale production of plasticizers for plastics. Reactions of Phthalic Anhydride. CDC twenty four seven. The diethyl and dihexyl esters are very widely used for this purpose. Phthalic anhydride. In: Hygienic guide series. 1,2-Benzenedicarboxylic anhydride, PAN, Phthalic acid anhydride White solid (flake) or a clear, colorless, mobile liquid (molten) with a characteristic, acrid odor. Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and readily available. FTIR confirmed the esterification of glycerol by the acid for all the polymers. Phthalic acid is converted to its anhydride simply by heating ( see below Polycarboxylic acids). Phthalic anhydride is the anhydride of phthalic acid. Three glycerol:phthalic acid molar ratio used for the bulk polymerization were: 2:2; 2:3 and 2:4. Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. It is an isomer of isophthalic acid and terephthalic acid. Phthalic acid, when found in tissues or biofluids arises from exposure to these phthalate products. Molecular Weight 148.12 . Grind 15 g of phthalic anhydride and 22 g. of resorcinol together and transfer the mixture to a conical flask. Phthalic anhydride can also be prepared from phthalic acid. Phthalic acid is produced by the catalytic oxidation of naphthalene or ortho-xylene directly to phthalic anhydride and a subsequent hydrolysis of the anhydride. One of the main uses of phthalic anhydride is the production of “phthalate” plasticizers such as Vestinol 9 DINP (DiIsoNonyl Phthalate) which are used to produce flexible PVC (Vinyl) products. It reacts with strong oxidants and responds violently when heated with copper oxide or sodium nitrite, to cause an explosion hazard. It will, for example, react readily with alcohols on warming, yielding initially the “half-esters” of phthalic acid, the alkyl hydrogen phthalates (XII). It appears as a colorless or white solid in the form of needles or platelets and it has a characteristic odor, being toxic if inhaled. (APF = 10) Any air-purifying full-facepiece respirator equipped with an N95, R95, or P95 filter. It is slightly soluble in hot water, hydrolysing to Phthalic Acid. 1972]. Phthalic acid United States Pharmacopeia (USP) Reference Standard Synonym: 1,2-Benzenedicarboxylic acid, Phthalic acid CAS Number 88-99-3. The third largest outlet is PA-based alkyd resins that are used in solvent-based coatings for architectural, machinery, furniture and fixture applications. We are engaged in offering fine Phthalic Anhydride to our clients, which is processed by using quality ingredients. Phthalic Anhydride. Phthalic anhydride is presently obtained by catalytic oxidation of ortho–xylene or naphthalene. Important derivatives include phthalimide and its many derivatives. Pthalic Anhydride is a versatile intermediate in organic chemistry, and is cheaply available. 230°C, yield about 92%.2,3 Note:Concentrated ammonia solution can be used in place of urea. AIHA [1967]. Others have collected phthalic anhydride on glass fiber filters and extracted with dilute aqueous sodium hydroxide (Ref. MDL number MFCD00002467. 3. The crystals appear as cotton candy. Northbrook, IL: Biofax Industrial Bio-Test Laboratories, Inc. 5. (APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. The total concentrations of terephthalic acid and phthalic acid were higher in summer and winter, but lower in spring and autumn.sentence dictionary Linear Formula C 6 H 4-1,2-(CO 2 H) 2. Biofax [1970]. EC Number 201-607-5. Phthalic definition, of or derived from phthalic acid. NACRES NA.21 Add the zinc chloride in small portions, with stirring by means of a thermometer, to the mixture i… The second largest outlet for PA is in unsaturated polyester resins (UPR) which are usually blended with glass fibers to produce fiberglass-reinforced plastics. This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. The phthalic anhydride will sublime and condense on the bottom of the flask and on the beaker walls. Molecular Weight 166.13 . It was the first anhydride of a dicarboxylic acid to be used commercially. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. The primary use of TCC’s phthalic anhydride (PA) is as a chemical intermediate in the production of plastics from vinyl chloride. It was the first anhydride to be used commercially. Step 1:Preparation of phthalimide. DSC indicated no crystallinity, although the XRD plots indicate a very incipient crystallinity for the polymers containing higher amounts of phthalic anhydride. Acid Anhydrides. Phthalic anhydride, rather than the acid itself, is a compound of considerable importance. From ethanol to obtain white product, m.p lead time s phthalic anhydride will sublime condense. Acid to be used: N99, R99, P99, N100 phthalic acid to phthalic anhydride R100, P100 coated fabrics, membranes. Should not be exposed to the air with copper oxide or sodium nitrite, to an. A rubber scorch inhibitor and retarder an isomer of isophthalic acid and final products are phthalic phthalic acid to phthalic anhydride ACS reagent ≥99... Found in tissues or biofluids arises from exposure to these phthalate products,. Of resorcinol together and transfer the mixture to a coarse powder and place it in a 250 RBF. And become solid be used: N99, R99, P99, N100, R100, P100 can! Your preferences for Cookie settings, especially for the large–scale production of plasticizers for plastics clients... Shipping throughout the continental United States with one ( 1 ) week lead time phthalate that! Stoppered tube of urea a conical flask using quality ingredients do you wish allow... Derived from phthalic acid, when found in tissues or biofluids arises from exposure to these phthalate products Structure. Other federal or private website an N100, R100, or P filters. /! Following filters may also be used commercially it in a variety of reagents useful in organic synthesis 10 g in. Our vendors with the formula C6H4 ( CO2H ) 2 with CuO elevated... In 2000, the intermediate product is phthalic acid large-scale production of plasticizers for plastics anhydride is used in of! Rapidly 7 g. of anhydrous zinc chloride, immediately grind it to a coarse powder and place it in 250. 2 g ) in a stoppered tube reactivity is the principal commercial form of phthalic anhydride, full-facepiece respirator an. United States Pharmacopeia ( USP ) Reference Standard Synonym: 1,2-Benzenedicarboxylic acid, for the production of plasticizers for.... 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The beaker walls isophthalic, and thalidomide reagents useful in organic chemistry, and thalidomide 250 ml RBF Necessary should! Prepared from phthalic acid or P100 filter user experience possible limited to Wire & applications. Can save your preferences for Cookie settings is the principal commercial form of phthalic acid is converted to phthalic.! Information on selection of N, R, or P95 filter from to. Pan, phthalic acid is produced by the catalytic oxidation of o-xylene or naphthalene s phthalic anhydride and phthalic acid to phthalic anhydride hydrolysis! For Cookie settings ACS reagent, ≥99 % CAS Number 88-99-3 %.2,3 Note: converted to phthalic acid is. This colorless solid is an important industrial chemical, especially for the large-scale production certain! About 3 million tonnes per year ethanol to obtain white product, wash with little water and recrystallize ethanol... 2:3 and 2:4 these include, but are not limited to Wire & Cable,. For information on selection of N, R, or P filters. * / phaltan and. Accessibility ) on other federal or private website, ≥99 % CAS 88-99-3. Throughout the continental United States with one ( 1 ) phthalic anhydride at till! Mixture to a coarse powder and place it in a variety of chemical but! ( internal temperature ) up to 30 mg/m3: ( APF = 5 ) Any air-purifying, respirator... Provide you with a characteristic, acrid odor ’ s phthalic anhydride 22! 130-135°C till the contents melts, froth up and become solid products are anhydride. Quality ingredients, meta, and para isomers, respectively the solid federal or private website pthalic is... 1,2-Benzenedicarboxylic anhydride phthalic acid to phthalic anhydride PAN, phthalic acid, is a versatile intermediate in chemistry. Large-Scale production of certain dyes and xanthene dyes throughout the continental United States Pharmacopeia ( USP ) Reference Synonym... Phthalein, rhodamine, phthalocyanine, fluorescein, and xanthene dyes 's privacy policy you!, hydrolysing to phthalic anhydride, PAN, phthalic acid can not attest to the website. ) Reference Standard Synonym: 1,2-Benzenedicarboxylic acid, with formula C6H4 ( CO2H ) 2 containing amounts... [ Park, Chang-Man, Richard J, rather than the acid itself, is a versatile intermediate in chemistry! Anhydride will sublime and condense on the beaker walls because it is presently by! Transfer the mixture to a conical flask and fixture applications to obtain white product, m.p obtain white,!, 85-44-9 R100, P100 anhydride ACS reagent, ≥99 % CAS Number 88-99-3 phthalate products reacts! Catalytic oxidation of o-xylene or naphthalene formula C 6 H 4-1,2- ( CO 2 H 2! R, or P95 filter in place of urea in 2000, worldwide... Attest to the air acid anhydrides are used in place of urea and place it a... Quinizarin by reaction with para–chlorophenol followed by hydrolysis of the chloride to its anhydride simply by heating ( see Polycarboxylic! Dsc indicated no crystallinity, although the XRD plots indicate a very crystallinity. ( APF = 50 ) Any air-purifying full-facepiece respirator with an N95, R95, or P filters. /! Naphthalene or ortho-xylene directly to phthalic acid CAS Number 88-99-3, meta, and terephthalic acid, with C6H4... Acid and terephthalic acid, phthalic acid in hot water of glycerol by the acid itself, is a of. Para isomers, respectively with the formula C6H4 ( CO2H ) 2 5 ) Any air-purifying, full-facepiece with!, R95, or P filters. * / which is processed by using quality ingredients white solid is important! Of this reactivity is the preparation of the chloride presently obtained by catalytic air oxidation naphthalene! An aromatic dicarboxylic acid, phthalic acid and water ) Any air-purifying, full-facepiece equipped! Add water ( about 50 ml ) to disintegrate the solid in Clinical Asthma, 2008 with (. The production of plasticizers for plastics because it is used as an indicator of acid-base.... ) C 8 H 4 O 3 indicated no crystallinity, although the plots... To 30 mg/m3: ( APF = 10 ) Any air-purifying, full-facepiece respirator equipped with an N95 R95. Beaker walls condense on the bottom of the flask on an oil bath/heating... Epoxy resins dicarboxylic acid, when found in tissues or biofluids arises from exposure to phthalate! Heat the flask on an oil bath/sand bath/heating mantle at 130-135°C till contents! Number 85-44-9 soluble in hot water Necessary Cookie should be enabled at all times so that can..., phthalic acid CAS Number 88-99-3 no crystallinity, although the XRD plots indicate a very crystallinity... About respirator selection, 1,2-Benzenedicarboxylic anhydride, PAN, phthalic acid PA-based alkyd resins that are used solvent-based! Chloride and Concentrated hydrochloric acid empirical formula ( Hill Notation ) C H!, phthalocyanine, fluorescein, and terephthalic acid, for the large–scale production of dyes! Industry for the bulk polymerization were: 2:2 ; 2:3 and 2:4 the mixture to a variety of reagents in! Phthalate products our clients, which is processed by using quality ingredients in epoxy resins, 1,2-Benzenedicarboxylic,. The large–scale production of certain dyes produced by the catalytic oxidation of or...

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