Phthalic anhydride from phthalic acid

However, the revised idlh for phthalic anhydride is 60 mgm 3 i. Pan is a principal commercial form of phthalic acid, discovered in 1836. Synthesis of fluorescein from resorcinol and phthalic anhydride. The icis phthalic anhydride reports will keep you informed and uptodate with market movements in asia, europe and the us. The largest markets for phthalic anhydride are phthalate plasticizers, unsaturated polyester resins, and alkyd resins for surface coatings. Unlike most such conversions this happens with ease. Phthalic acid, when found in tissues or biofluids arises from exposure to these phthalate products. Molecular formula of phthalic anhydride e c 8 h 4 o 3. Phthalic anhydride definition, a white, crystalline, slightly watersoluble solid, c8h4o3, used chiefly in the manufacture of dyes, alkyd resins, and plasticizers. Opa did not cause mutations in bacterial tests including ames, but a mutagenic effect was seen in fruit flies ref. Others have collected phthalic anhydride on glass fiber filters and extracted with dilute aqueous sodium hydroxide ref. 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. Phthalic acid is an aromatic dicarboxylic acid, with formula c6h4cooh2. Phthalic anhydride is the organic compound with the formula c6h4co2o. Find product specific information including uses, price, cas, msds, protocols and references.

It is more severely irritating in the presence of water, due to the pronounced effects of the phthalic acid which is formed. This white solid is an important industrial chemical. Jan 26, 2015 this method was borrowed from both youtuber users nurdrage and uc235. 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. Phthalic anhydride definition of phthalic anhydride by. Making phthalic anhydride from phthalic acid youtube. Phthalates are a group of industrial compounds produced by the esterification of phthalic anhydride with an alcohol e. It is known as an adaptable intermediate in chemical processes because it is bifunctional and readily available. Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and readily available. 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 anhydride is used to manufacture materials such as artificial resins. This method was borrowed from both youtuber users nurdrage and uc235.

Phthalic anhydride, the anhydrous form of the acid, gave no evidence of carcinogenicity in longterm feeding studies in rats and mice. Phthalic anhydride is also used as an intermediate in the production of pigments and dyes, agricultural, pharmaceutical, and several other chemical products. The source is also providing more information like the publication year, authors and more. Phthalic anhydride is an organic compound known by the molecular formula c6h4co2o. Phthalic anhydride is the anhydride of phthalic acid. Phthalic anhydride article about phthalic anhydride by. Our pa plant is a manufacturing plant which opened for the first time in the republic of korea. How to make phthalic acid and phthalic anhydride youtube. It is an isomer of isophthalic acid and terephthalic acid.

Basf provides phthalic anhydride pa catalysts for the production of phthalic anhydride from the oxidation of oxylene and naphthalenemixed feed. Manufacturer and substance identification thirumalai chemicals limited. This colorless solid is an important industrial chemical, especially for the largescale production of. Exposure routes inhalation, ingestion, skin andor eye contact. Igpl is one of the largest single location producers of phthalic anhydride pan of international standards. Phthalic is contained in 2 matches in merriamwebster dictionary. 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.

Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived. Learn definitions, uses, and phrases with phthalic. Tccs phthalic anhydride is a toxic, white crystalline compound used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Unlike most such conversions this happens with ease due to the formation of a 5membered ring. 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. Is phthalic anhydride is soluble in methanol answers. Phthalic anhydride definition of phthalic anhydride at. Phthalic anhydride is a direct but delayed irritant of the skin. Phthalic definition, of or derived from phthalic acid. Usdot 2008 emergency response guidebook initial response information. Phthalic anhydride is the organic compound with the formula c 6 h 4 co 2 o.

Phthalic anhydride wikimili, the free encyclopedia. Phthalic anhydride is an important starting product in the manufacture of various phthalic acid derivatives, including esters, phthalimide, and phthalonitrile. Urine samples were also subjected to acid, alkaline. The condensation of phthalic anhydride with phenols is used to obtain dyes, such as phenolphthalein. Introduction phthalic acid can be converted to phthalic anhydride by heating the acid above 180c. Phthalic anhydride pa is used as the major ingredient in the manufacture of plasticizers, unsaturated polyester resin, paint and others. Phthalic anhydride pa is a white crystalline compound used to manufacture plasticizers, pigments, dyes and resins. A wide variety of phthalic anhydride options are available to you. Phthalic anhydride is a principal commercial form of phthalic acid. Phthalic anhydride can also be prepared from phthalic acid. Phthalic anhydride reacts violently with cuo at elevated temperatures park, changman, richard j. Melt of phthalic anhydride containing a small amount of azeotroping agent is maintained at a temperature of from 160 to 200c. In this video we will be extracting dehp from vinyl gloves, and then cleaving the ester bonds to form alcohols and phthalic acid. 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.

Cdc niosh pocket guide to chemical hazards phthalic anhydride. Conversion of phthalic acid to phthalic anhydride sciencemadness. Basf has been producing pa for over 140 years and researching pa catalysts for more than 120 years. Oct 31, 2017 i make phthalic anhydride from phthalic acid by heating. Prolonged or repeated exposure also may cause dermatitis. It is presently obtained by catalytic oxidation of ortho xylene or naphthalene. Sigmaaldrich offers sigmaaldrich320064, phthalic anhydride for your research needs. Phthalic anhydride article about phthalic anhydride by the. Phthalic anhydride is slightly soluble in methanol.

In this case, phthalic anhydride will actually react with its solvent. Phthalic anhydride an overview sciencedirect topics. Phthalic acid is an aromatic dicarboxylic acid, with formula c 6 h 4 co 2 h 2. Pan is a versatile intermediate in organic chemistry. I make phthalic anhydride from phthalic acid by heating. Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. Phthalic anhydride containing materials are used in coatings applications for home. Market news and analysis includes an overview, regional. It was the first anhydride of a dicarboxylic acid to be used commercially and is comparable in its importance to acetic acid. This page contains information on the chemical phthalic anhydride including. Rabbit sperm motility was inhibited by the potassium salt. Synthesis of anthranilic acid and phthalic anhydride. Phthalic acid concentration in the urine was measured after esterification with methanol by electron capture gas chromatography, and expressed in terms of urinary creatinine. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale.

The first reaction step results in the formation of a monoester, which is subsequently converted to a diester in a second reaction step. Find more compounds similar to phthalic anhydride note. Phthalic anhydride, rather than the acid itself, is a compound of considerable importance. It was the first anhydride of a dicarboxylic acid to be used commercially. Phthalic anhydride market size, share, trends, global.

It will, for example, react readily with alcohols on warming, yielding initially the halfesters of phthalic acid, the alkyl hydrogen phthalates xii. With continued technology development and expansion, we now have the worlds greatest production capability. Phthalic anhydride is a white lustrous needles solid that is slightly soluble in water. Phthalic anhydride is usually used as a chemical median for the production of plastics from vinyl chloride. Phthalic acid and derivatives lorz major reference works. Phthalic anhydride is an important starting product in the manufacture of various phthalicacid derivatives, including esters, phthalimide, and phthalonitrile. The most important reaction of pan is with alcohols or diols to give esters or polyesters.

Phthalic anhydride definition is a crystalline cyclic acid anhydride c8h4o3 used especially in making alkyd resins. Further esterification in the presence of sulphuric acid gives rise to the dialkyl phthalates. Phthalic anhydride and maleic anhydride are commonly used in paints, varnishes and various plastic coatings. Structure, properties, spectra, suppliers and links for.

Phthalic anhydride containing materials are used in coatings applications for home appliances, automobiles, medical devices and furniture. Conversion of phthalic acid to phthalic anhydride august 10, 20 by magpie a. Phthalic anhydride is converted to phthalic acid in the presence of water. 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 total pa at basfs ludwigshafen germany site since 1873 is more than 4.

Cdc niosh pocket guide to chemical hazards phthalic. Phthalic acid can be converted to phthalic anhydride by heating the acid above 180c. 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. Code of federal regulations title 49 section 172 shipping regulations and proper shipping name. The annual production of phthalic anhydride exceeded 1,000,000 metric tons in the late 20th century.