Phthalic anhydride from phthalic acid

Phthalic anhydride containing materials are used in coatings applications for home. Market news and analysis includes an overview, regional. Phthalic anhydride is also used as an intermediate in the production of pigments and dyes, agricultural, pharmaceutical, and several other chemical products. A wide variety of phthalic anhydride options are available to you. Molecular formula of phthalic anhydride e c 8 h 4 o 3.

Synthesis of anthranilic acid and phthalic anhydride. Phthalic anhydride article about phthalic anhydride by the. Pan is a principal commercial form of phthalic acid, discovered in 1836. Phthalic anhydride definition, a white, crystalline, slightly watersoluble solid, c8h4o3, used chiefly in the manufacture of dyes, alkyd resins, and plasticizers. Basf has been producing pa for over 140 years and researching pa catalysts for more than 120 years. It is presently obtained by catalytic oxidation of ortho xylene or naphthalene. The phthalic anhydride plant is an integral part of the iso 9001.

The most important reaction of pan is with alcohols or diols to give esters or polyesters. Phthalic definition, of or derived from phthalic acid. Phthalic acid is an aromatic dicarboxylic acid, with formula c6h4cooh2. Phthalic anhydride is a direct but delayed irritant of the skin. Phthalic acid is an aromatic dicarboxylic acid, with formula c 6 h 4 co 2 h 2. Phthalic anhydride pa is used as the major ingredient in the manufacture of plasticizers, unsaturated polyester resin, paint and others. Conversion of phthalic acid to phthalic anhydride august 10, 20 by magpie a. Usdot 2008 emergency response guidebook initial response information. Further esterification in the presence of sulphuric acid gives rise to the dialkyl phthalates. Because both these methods convert the collected phthalic anhydride to, and analyze as, phthalic acid, they are susceptible to positive interference from any phthalic acid originally present in the air. Structure, properties, spectra, suppliers and links for. Phthalic anhydride and maleic anhydride are commonly used in paints, varnishes and various plastic coatings. Opa did not cause mutations in bacterial tests including ames, but a mutagenic effect was seen in fruit flies ref. It will, for example, react readily with alcohols on warming, yielding initially the halfesters of phthalic acid, the alkyl hydrogen phthalates xii.

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. Phthalic anhydride is a principal commercial form of phthalic acid. Manufacturer and substance identification thirumalai chemicals limited. The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. Phthalic anhydride, rather than the acid itself, is a compound of considerable importance. Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. Melt of phthalic anhydride containing a small amount of azeotroping agent is maintained at a temperature of from 160 to 200c. Phthalic anhydride is used to make polymeric resins called alkyd resins, which are used as coatings, especially for appliances and automobiles. Conversion of phthalic acid to phthalic anhydride sciencemadness.

Igpl is one of the largest single location producers of phthalic anhydride pan of international standards. Prolonged or repeated exposure also may cause dermatitis. This white solid is an important industrial chemical. Unlike most such conversions this happens with ease due to the formation of a 5membered ring.

Phthalic anhydride definition of phthalic anhydride by. Phthalic anhydride is slightly soluble in methanol. Phthalic anhydride is an important starting product in the manufacture of various phthalic acid derivatives, including esters, phthalimide, and phthalonitrile. Exposure routes inhalation, ingestion, skin andor eye contact. About 1% of these are appliance paint, 0% are building coating, and 35% are pharmaceutical intermediates. 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. Rabbit sperm motility was inhibited by the potassium salt. Phthalic anhydride can also be prepared from phthalic acid. Phthalic anhydride an overview sciencedirect topics. Phthalic anhydride pa is a white crystalline compound used to manufacture plasticizers, pigments, dyes and resins. Phthalic anhydride is usually used as a chemical median for the production of plastics from vinyl chloride. Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and readily available. Phthalic anhydride containing materials are used in coatings applications for home appliances, automobiles, medical devices and furniture. The first reaction step results in the formation of a monoester, which is subsequently converted to a diester in a second reaction step.

Phthalic anhydride is the anhydride of phthalic acid. I make phthalic anhydride from phthalic acid by heating. Cdc niosh pocket guide to chemical hazards phthalic anhydride. How to make phthalic acid and phthalic anhydride youtube. Phthalic anhydride is a white lustrous needles solid that is slightly soluble in water. Is phthalic anhydride is soluble in methanol answers. Find more compounds similar to phthalic anhydride note. Synthesis of anthranilic acid and phthalic anhydride ligand and their metal complexes saleem raza 1, yousaf iqbal, iqbal hussian2, muslim raza1, syed uzair ali shah 3, ajmal khan, raheela taj 1 and abdur rauf 1institute of chemical sciences, university of. Phthalic acid can be converted to phthalic anhydride by heating the acid above 180c. This phthalic anhydride will be used in further synthesis to make phenolphthalein and phthalimide precursor to anthranilic acid. Phthalic is contained in 2 matches in merriamwebster dictionary. 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.

Phthalic acid concentration in the urine was measured after esterification with methanol by electron capture gas chromatography, and expressed in terms of urinary creatinine. Phthalic anhydride market size, share, trends, global. This page contains information on the chemical phthalic anhydride including. Phthalic anhydride is an organic compound known by the molecular formula c6h4co2o. Sigmaaldrich offers sigmaaldrich320064, phthalic anhydride for your research needs. It was the first anhydride of a dicarboxylic acid to be used commercially. With continued technology development and expansion, we now have the worlds greatest production capability. Phthalic anhydride definition of phthalic anhydride at. Phthalic anhydride wikimili, the free encyclopedia. Phthalic acid and derivatives lorz major reference. Phthalic anhydride article about phthalic anhydride by. It was the first anhydride of a dicarboxylic acid to be used commercially and is comparable in its importance to acetic acid.

Urine samples were also subjected to acid, alkaline. Phthalic acid and derivatives lorz major reference works. The annual production of phthalic anhydride exceeded 1,000,000 metric tons in the late 20th century. It is known as an adaptable intermediate in chemical processes because it is bifunctional and readily available. Phthalic anhydride manufacturer in india thirumalai. Making phthalic anhydride from phthalic acid youtube.

Tccs phthalic anhydride is a toxic, white crystalline compound used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Phthalic acid anhydride, 1,3isobenxofurandione, 1,2 benzene carboxylic acid anhydride. Others have collected phthalic anhydride on glass fiber filters and extracted with dilute aqueous sodium hydroxide ref. Us2105911a us54507531a us2105911a us 2105911 a us2105911 a us 2105911a us 54507531 a us54507531 a us 54507531a us 2105911 a us2105911 a us 2105911a authority us united states prior art keywords phthalic anhydride sulfuric acid catalytic impure distillate prior art date 19260121 legal status the legal status is an assumption and is not a legal. In this video we will be extracting dehp from vinyl gloves, and then cleaving the ester bonds to form alcohols and phthalic acid. Oct 31, 2017 i make phthalic anhydride from phthalic acid by heating. Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived. Phthalic anhydride definition is a crystalline cyclic acid anhydride c8h4o3 used especially in making alkyd resins. Basf provides phthalic anhydride pa catalysts for the production of phthalic anhydride from the oxidation of oxylene and naphthalenemixed feed.

Synthesis of anthranilic acid and phthalic anhydride ligand. The total pa at basfs ludwigshafen germany site since 1873 is more than 4. Phthalic anhydride is used to manufacture materials such as artificial resins. Phthalic anhydride is converted to phthalic acid in the presence of water. Introduction phthalic acid can be converted to phthalic anhydride by heating the acid above 180c.

This colorless solid is an important industrial chemical, especially for the largescale production of. Code of federal regulations title 49 section 172 shipping regulations and proper shipping name. Phthalic anhydride is the organic compound with the formula c 6 h 4 co 2 o. Find product specific information including uses, price, cas, msds, protocols and references. The largest markets for phthalic anhydride are phthalate plasticizers, unsaturated polyester resins, and alkyd resins for surface coatings. This method was borrowed from both youtuber users nurdrage and uc235. It is more severely irritating in the presence of water, due to the pronounced effects of the phthalic acid which is formed. In this case, phthalic anhydride will actually react with its solvent.

Phthalic anhydride is the organic compound with the formula c6h4co2o. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Phthalic anhydride reacts violently with cuo at elevated temperatures park, changman, richard j. The icis phthalic anhydride reports will keep you informed and uptodate with market movements in asia, europe and the us. Jan 26, 2015 this method was borrowed from both youtuber users nurdrage and uc235. Thermal decomposition of ophthalic acid 1,2benzenedicarboxylic or simply phthalic acid starting around 200c leads to the formation of phthalic anhydride. Phthalic anhydride is a white crystalline solid that is the commercial form of phthalic acid.

Synthesis of fluorescein from resorcinol and phthalic anhydride. Phthalic acid, colourless, crystalline organic compound ordinarily produced and sold in the form of its anhydride. 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. Undergoes exothmeric nitration with fuming nitric acidsulfuric acid and may give mixtures of the potentially explosive phthaloyl nitrates or nitrites or their nitro derivatives chem. This colorless solid is an important industrial chemical, especially for the largescale production of plasticizers for plastics. Pan is a versatile intermediate in organic chemistry. However, the revised idlh for phthalic anhydride is 60 mgm 3 i.

Cdc niosh pocket guide to chemical hazards phthalic. The primary use of phthalic anhydride pa is as a chemical intermediate in the production of plasticizers from polyvinyl chloride pvc. Synthesis of anthranilic acid and phthalic anhydride ligand and their metal complexes saleem raza 1, yousaf iqbal, iqbal hussian2, muslim raza1, syed uzair ali shah 3, ajmal khan, raheela taj 1 and abdur rauf 1institute of chemical sciences, university of peshawar, peshawar, pakistan. The source is also providing more information like the publication year, authors and more. Our pa plant is a manufacturing plant which opened for the first time in the republic of korea. Unlike most such conversions this happens with ease. Phthalic anhydride, the anhydrous form of the acid, gave no evidence of carcinogenicity in longterm feeding studies in rats and mice. Learn definitions, uses, and phrases with phthalic. Phthalic anhydride is an important starting product in the manufacture of various phthalicacid derivatives, including esters, phthalimide, and phthalonitrile. Phthalates are a group of industrial compounds produced by the esterification of phthalic anhydride with an alcohol e. Our network of locallybased reporters publish weekly price assessments for spot and contract, depending on the region.