On Wed, Jun 06, 2001 at 06:52:33AM -0400, W. Allen Dick wrote: > > Has anyone an information as to the actual chemical makeup of Apistan and > whether there is there any chlorine or fluorine component to the molecule? > According to the Merck Index, fluvalinate has the empirical formula: C H ClF N O 26 22 3 2 3 So yes, it contains a small amount of chlorine and fluorine. The structural formula is a bit beyond my ASCII art abilities, but it is essentially two benzene rings connected by a rather messy collection of C,H,O, and N, with one chlorine and a CF3 group hung off of one of the rings. -- Tim Eisele [log in to unmask]