Frédéric Swarts born 1866: organic fluorides; Swarts reaction. He was the first to prepare chlorofluorocarbons (CFCs): the first one he made was CFCl3, but he was also first to make CF2Cl2, the first CFC to become commercially important.
Milestone case for forensic chemistry begins with the disappearance of a young German girl, later found murdered, in 1898. For the first time, chemical analysis of blood stains (precipitin reaction) contributed to a conviction.