4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic Anhydride
https://www.sciencecollaboration.org/shop/fm-3b-i0856-44-44-isopropylidenediphenoxy-diphthalic-anhydride-73553
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4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic Anhydride 25g : High-performance dianhydride for polyimides, resins, and electronic materials. Provides thermal and mechanical strength.
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diphthalic%20Anhydride?unique=f8cbf8d)