What was known as inheritance powder in the 19th century?

The classic poison of the middle-ages, arsenic is both an agent and a product of industrial smelting. Arsenic became notorious as inheritance powder in the 19th century for its use in Europe, especially among Italian aristocracy, to accelerate magisterial turnover. Arsenic is also a component of green paints and glazes, and has claimed the lives quite by accident of plenty of unknowing, or merely careless, artists. Inheritance powder is the macabre synonym for powdered arsenic, which is intermittently popular as a poison that induces slow mental deterioration and vague gastrointestinal symptoms in its victims, who may have been poisoned by next-of-kin eager to inherit the victim’s worldly possessions.