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    douwinchem douwinchem
    November 23, 2021 ·
    Phthalic Anhydride (PA)
    https://www.douwin-chem.com/products/phthalic-anhydride-pa/ /> #phthalic #anhydride #supplier
    Phthalic Anhydride (PA)
    Phthalic anhydride is an organic compound, C8H4O3, which is a circular anhydride formed by the dehydration of...  more
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