In 1879, a chemist left a lab without washing his hands: A sweet taste on his fingers revealed saccharin and changed the history of artificial sweetness

Some scientific discoveries come after careful planning over decades. Some others are made out of small mistakes that were not noticed at the very beginning. The discovery of saccharin, the first non-nutritive sweetener to become commercially successful in the world, falls under the latter type. As per its history, the first time saccharin was discovered came in 1879 when a scientist working on the compounds of coal tar chemistry accidentally found it after his meal.

According to the American Chemical Society, the scientist who was working on the compounds in the laboratory of Johns Hopkins University realized that something tasted too sweet on his hands.

The organization further reveals that Constantin Fahlberg had linked the sweet taste to a compound called benzoic sulfimide, which was later called saccharin.

A discovery rooted in accident

The longevity of the narrative is partly due to its mundane nature. It was not a sensational revelation of some scientific breakthrough or a carefully thought-out process of inventing something. On the contrary, it was a discovery made amid everyday life in the lab.

This idea is further reinforced by another peer-reviewed review, which appeared in PubMed Central. According to the review, saccharin was discovered accidentally by Fahlberg and Ira Remsen in 1879, when Fahlberg did not wash his hands after laboratory work and started to taste food. In other words, there was nothing special about the process of the discovery of saccharin. It was just accidental.

It is worth noticing at this point that the substance was initially not intended as a sweetener and sugar substitute. It became apparent only during the accidental experiment.

After this realization occurred, however, it took place rather quickly.

As noted by the American Chemical Society, saccharin was soon commercialized in Germany.

The beginning of sweetness without sugar

Prior to its discovery, sweetness meant sugar. But with the advent of saccharin, there was another aspect – a sweetness with no calories. The concept would become instrumental in defining an entire segment of the modern food manufacturing sector.

In this regard, according to the American Chemical Society, saccharin became the pioneering example of a commercially successful artificial sweetener, thereby setting a precedent for another class of food products. Likewise, PubMed index historical research confirms that the substance was initially synthesized in 1879 and became a significant sugar substitute thereafter.

But the significance of the development was more than chemical in nature.

It showed that now sweetness could be independent of nutrition. No longer did sugar have to provide taste; hence, the way companies manufactured their products changed.

An accidental discovery in the laboratory had set up a new connection between chemistry and consumption.

A sweetener surrounded by doubt

But the rise of saccharin was not entirely smooth.

As described by the American Chemical Society, debates about saccharin developed early in its development, particularly as public concerns over the use of additives in food increased in the twentieth century. Saccharin became established in an era of conflict between various ideas of safety and nature.

This became the defining feature of saccharin's past.

One literature review of toxicology studies indexed at PubMed explains that saccharin was marked by controversy throughout most of its history. These included toxicological, epidemiological, and even animal tests conducted over decades without reaching any clear conclusions regarding saccharin's safety.

In effect, the debate over saccharin became symbolic of the broader concerns over the role of science in regulating foods produced by industrial means.

Saccharin's history became an expression of a modern preoccupation: how certain do people have to be in accepting changes that science brings to their dietary practices?

Why the story still survives

However, this historical value is due, in part, to the continued appeal of the accident story in which the discovery took place.

ACS educational materials describe saccharin as one of several discoveries associated with accidental sensory observations in the laboratory.
What makes the story interesting is that it perfectly depicts the way in which many discoveries occur in the real world – not always planned, but rather an expression of curiosity and careful observation.

Even now, more than a century later, scientific articles continue to cite saccharin. In particular, a peer-reviewed study in PubMed Central indicates that saccharin represents a valuable scaffold for use in medicinal chemistry research. This long scientific life contributes greatly to the value of the accidental discovery of the artificial sweetener in the first place.

This lengthy scientific history accounts for the continuing fascination of the story.

Rather than being just a case of a forgetful scientist tasting a chemical residue off his fingers, the story of saccharin became a global discussion about sweetness, science, safety, and trust. From one simple experiment, a new era in the chemistry of food emerged.