C&EN 90th Anniversary 1990-1999 Timeline


1990 PBS premieres the TV series “The World of Chemistry,” hosted by Roald Hoffmann.

1990 Congress amends the Clean Air Act, making air pollution standards significantly tougher.

1991 Sumio Iijima discovers the carbon nanotube.

1992 Robert A. Holton patents a route to Taxol that begins with a compound in yew tree needles, sparing the trees.

1993 Dow Chemical wins Supreme Court decision in the Daubert case, requiring judges to use peer-reviewed science in court.

1994 Calgene’s Flavr Savr tomato becomes the first genetically modified food to hit the market.

1995 Eric A. Cornell and Carl E. Wieman make the first Bose-Einstein condensate, which displays quantum mechanical properties on the macroscopic scale.

1996 The Food Quality Protection Act and amendments to the Safe Drinking Water Act require EPA to develop a program to screen chemicals for their potential to interact with the human endocrine system.


1996 Dolly, a sheep, is the first cloned animal.

1996 EPA finalizes the U.S. phaseout of leaded gasoline.

1997 Low doses of bisphenol A are found to have endocrine-disrupting effects in laboratory animals. Controversy begins over safety of bisphenol A in plastics.

1998 C&EN Online debuts.

1998 FDA approves use of Viagra (sildenafil) to treat impotence.

1998 Andrew Z. Fire and Craig C. Mello demonstrate that small RNA molecules can inhibit gene expression in the worm C. elegans.

1998 Paul Anastas and John C. Warner publish the 12 Principles of Green Chemistry.

Download C&EN 90th Anniversary Poster Timeline (pdf)