Saccharin is the common name of o-benzoylsulfonimide.

In 1879, in the laboratory of Johns Hopkins University in the United States, Russian chemist Farid Berg extracted toluene from black, sticky, and smelly coal tar, and then used sulfuric acid to produce toluene. After treatment with chemical, phosphorus pentachloride and ammonia, it is oxidized with potassium permanganate, and finally through crystallization and dehydration, a particularly sweet white crystal is obtained. He called it "saccharin" and determined that it was 500 times sweeter than sucrose. In 1886, Faridberg immediately announced his invention and received a patent in the United States. He moved to Germany, where he built the world's first factory for refining saccharin from coal tar. Saccharin began to break into people's lives.