High-purity liquid crystal intermediates

9,9-dimethyl-9H-fluorene-2,7-diamine  216454-90-9

Synonyms:DMFDA

Appearance:white powder 

Purity:99%min 

Physical and Chemical Properties

• Appearance: White to light yellow crystalline powder

• Molecular formula: C₁₅H₁₆N₂

• Molecular weight: 224.30 g/mol

• Melting point: 230–234 °C

• Solubility: Soluble in polar aprotic solvents such as DMF, DMAc, NMP; slightly soluble in ethanol; insoluble in water

• Stability: Stable under normal conditions, sensitive to air and light

• Characteristic: Rigid fluorene structure, high thermal stability, low dielectric constant, good solubility

Applications

• Monomer for high-performance polyimides (PI) and polyamides

• Used in transparent polyimide films for flexible displays, OLED, and optoelectronic materials

• Applied in high-temperature resistant resins, coatings and composite materials

• Used in low-dielectric materials for 5G communication and microelectronic packaging

• Intermediate for organic luminescent materials and pharmaceutical synthesis

• HS Code: 2921590090