Boronic acid, B-9,9'-spirobi[9H-fluoren]-2'-yl- (CAS 236389-21-2)

Application and positioning

Boronic acid on the 2' position, that is on the second fluorene half of the spiro, which keeps the two halves orthogonal. Used to hang a spirobifluorene onto a host core without letting the two π systems conjugate. Laurand supplies it from audited Chinese producers in kilogram to multi-hundred-kilogram lots, with the documentation your market requires.

Quality and documentation

• Batch-specific Certificate of Analysis with HPLC or GC purity and a full impurity profile
• Trace metal report (Pd, Fe, Cu) on request — residual catalyst is what limits OLED device lifetime
• Water content by Karl Fischer and residual solvent data for solution-processed grades
• SDS in the language of your market, with GHS classification for the destination
• Pre-shipment sample for laboratory approval on first orders

Packaging and handling

• 1 kg, 5 kg and 25 kg fibre drums with inner PE liner; amber glass bottles for gram to kilogram quantities on request
• Sealed and protected from light — aromatic OLED intermediates discolour under prolonged UV exposure
• Store at ambient temperature in a dry, dark warehouse, away from strong oxidising agents

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Values marked (predicted) are calculated estimates; the remaining data are published literature values. The specification of the delivered lot is confirmed with the quotation.