25 g vial 685-27-8 35617 TFAA (trifluoroacetic acid anhydride) 10-pk. (10x1 g) 407-25-0 35618 25 g vial 407-25-0 35619 sample analysis by GC. In silylation, an active hydrogen is re-placed by an alkylsilyl group such as trimethylsilyl (TMS) or terttert ...