High-purity liquid crystal intermediates

3,3'-(p-phenylenedioxy)diphthalic anhydride  52257-41-7

Synonyms:3,3'-HQDPA

Purity:99%min 

Physical and Chemical Properties

• Molecular formula: C₂₂H₁₀O₈

• Molecular weight: 402.31 g/mol

• Melting point: ~245–250 °C

• Solubility: Soluble in polar aprotic solvents (DMF, DMAc, NMP); insoluble in water

• Stability: Hygroscopic; store sealed in dry, cool place

Uses

• Key dianhydride monomer for melt-processable polyimides (PI)

• Imparts good flexibility, solubility, and melt flowability to polyimide resins

• Used in high-temperature adhesives, composite matrices, and thermoplastic PI films

• HS Code: 2917399090