Hennig Brand

Hennig Brand was a German alchemist who lived and worked in Hamburg. Around the year 1669, Brand made an important discovery while looking for something called the "philosopher's stone," which people believed could change ordinary metals into gold. During his experiments, he accidentally found a new chemical element called phosphorus. This discovery was very important because phosphorus was one of the first elements to be discovered in modern times, and it has many useful applications even today. Brands' work shows how sometimes important discoveries can happen by accident while searching for something else.

Biography

Hennig Brand was born around 1630. Some sources say he came from a family of workers and had worked as a young glassmaker, while others say he was from a higher social class. He served as a junior army officer during the Thirty Years' War and had enough money from his first wife's inheritance to study alchemy after leaving the army.

Brand was one of many people searching for a substance called the philosopher's stone. During his experiments, he accidentally discovered the element phosphorus. He is believed to have died around 1692 or 1710.

Discovery of phosphorus

Hennig Brand was searching for a magical substance called the "philosopher's stone" that people believed could turn cheap metals into gold. He tried many mixtures, including using urine with other materials, following an old recipe he found in a book.

In about 1669, Brand heated a mixture made from boiled-down urine. Suddenly, glowing fumes filled his furnace, and a liquid that burst into flames dripped out. He caught this liquid, and it solidified while continuing to glow with a pale-green light. This was phosphorus, named for its ability to carry light. Brand kept his discovery secret at first but later sold the recipe for making phosphorus. Other scientists later discovered the same thing on their own.

The process involved letting urine stand, boiling it down, and heating it strongly to produce phosphorus. The chemical reaction created phosphorus from phosphates in the urine when heated with carbon. Though Brand's method used a lot of urine to make only a small amount of phosphorus, it was an important discovery.