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Certificate of Analysis

Lapatinib Ditosylate

Molecular Formula:	C₂₉H₂₆ClFN₄O₄S.2C₇H₈O₃S
Molecular Weight:	925.46
CAS No.:	388082-77-7
Storage (From the date of receipt):	3 years -20°C powder
	1 year -80°C in solvent
Image:

HPLC: 99.96% purity | NMR: Consistent with structure