saccharin

In the summer of 1879, Constantin Fahlberg, a Romanian-born chemist working in Ira Remsen's laboratory at Johns Hopkins University, noticed that his bread tasted unusually sweet at dinner. He had not washed his hands after a day's work with coal tar derivatives, and a compound called ortho-sulfobenzoic acid imide had transferred from skin to food. He returned to the laboratory at once, tasting every beaker and vessel on his bench until he isolated the source. That night he discovered saccharin, a substance roughly 300 times sweeter than sugar.

Fahlberg named the compound from the Latin saccharum, which the Romans had borrowed from Greek sakkharon, a word that itself traced back to Sanskrit sharkara, meaning gravel or grit, from the appearance of crystallized raw sugar. The Latin root had already generated a small family of scientific terms: saccharose, saccharide, saccharification. Saccharin slotted into that family with a suffix borrowed from chemistry's naming conventions rather than from etymology, but the lineage to ancient India was real.

Fahlberg patented saccharin independently in 1884, without credit to Remsen, producing the first major dispute over intellectual property in organic chemistry. The compound found its first mass audience during the First World War, when sugar rationing forced manufacturers and households alike to look for alternatives. A second wave of adoption came in the 1950s and 1960s, when weight-loss culture made sugar-free a marketing asset. Saccharin appeared in cyclamate blends until the FDA banned cyclamates in 1969, leaving saccharin to bear the entire artificial sweetener market alone.

The FDA proposed banning saccharin in 1977 after Canadian rat studies showed bladder tumors at extremely high doses. The proposal triggered a public backlash so intense that Congress imposed a moratorium and required warning labels instead. Those labels disappeared in 2000, after the National Toxicology Program delisted saccharin as a carcinogen, concluding that rats and humans metabolize it differently. The word that began in an unwashed hand became the world's oldest surviving artificial sweetener, still in production today.