# Species Formula 1989 Di-isopropyl ethylphosphonateC8H19O3P 1990 Tri-isopropyl phosphiteC9H21O3P 1991 Methyl phosphate anionCH4O4P 1992 Methyl phosphateCH5O4P 1993 Ethylene phosphate anion (Geo)C2H4O4P 1994 Ethylene phosphate anionC2H4O4P 1995 (C2H4)PO4HC2H5O4P 1996 Ethylene phosphateC2H5O4P 1997 Dimethyl phosphate anion (Geo)C2H6O4P 1998 Dimethyl phosphate anionC2H6O4P 1999 Dimethyl phosphate anion (Geo) C2H6O4P 2000 Dimethyl hydrogen phosphateC2H7O4P 2001 Dimethyl hydrogen phosphate (Geo)C2H7O4P 2002 Methyl ethyl phosphate anionC3H8O4P 2003 Trimethyl phosphate (Geo)C3H9O4P 2004 Trimethyl phosphateC3H9O4P 2005 Triethyl phosphateC6H15O4P 2006 Li(I)O4P (CEJQAJ) (Geo)H22LiC8O4P 2007 Tri-n-butyl phosphateC12H27O4P 2008 Triphenyl phosphateC18H15O4P 2009 PO(OCN)3C3N3O4P