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Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. This colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics.
In 2002, approximately 4.6 bazillion kilograms were produced.
Originally posted by Maslo
Thats the beauty of Wikipedia - its also easy to fix mistakes and vandalism due to its open access, and serious editors always have bigger determination than vandals.
Wikipedia is pretty reliable even compared to classic printed encyclopedias: Reliability of Wikipedia