In practical alchemy, mercury II oxide (HgO) is often called the "Red Precipitate," with its compound Mercuric Amidochloride (Hg(NH2)Cl),...

Iodine (I) is an essential element in biology, industry, science and health. It's known for its intense violet gas and strong odor....

Chlorine (Cl) is a vital element in nature, used in industry as a disinfectant. Characterized by its highly reactive habits, chlorine is...

Carl Wilhelm Scheele (1742 - 1786) is a self-taught German-Swedish chemist whose work has strong impact on chemical sciences of the day....

Copper (II) sulfate CuSO4 yields a vivid color and widespread applications. Also known as blue vitriol in alchemy and chalcanthite in...

Chloroauric acid H[AuCl4] is a yellow solution created in the 18th century. A gold(III) salt, chloroauric acid is an innovative compound,...

Alchemy these days is often seen only as a mystical practice purveying the clic hé of turning base metals into gold. Alchemy is in fact...

Hydrochloric acid is a powerful chemical. Used from old alchemical practices to modern times, this colorless, pungent-smelling liquid is...

Chemistry from 1600 to 1800 yields transformative discoveries influential today. In the German lands this era is characterized by...

The Scientific Revolution, from 1543 to 1687, transforms human understanding of the natural world. This period involves events and...

Antonie van Leeuwenhoek (1632 - 1723) is a self-taught scientist whose work in microscopy revolutionizes medicine and other disciplines....

Acidophillium and Acidobacillus ferroxidens bacteria thrive in harmful conditions. These microscopic sulfuric acid-eating bacteria use...

Catalase is an enzyme found in carbon life forms, including humans. It's known for its exceptional ability to decompose hydrogen peroxide...

Peracetic acid is a remarkable compound with powerful benefits and considerable risks. A colorless liquid with a sharp odor similar to...

Protozoa are single-celled organisms integral to ecosystems worldwide. As microbes they're microscopic and invisible to the human eye....

Rust hides within itself a secret life, orchestrated by industrious communities of microscopic bacteria with immense power in the process...

Potassium Hydroxide, also known as caustic potash, has a history dating back to ancient times. A versatile chemical compound, it's used...

Decay is a fundamental aspect of life cycles. An essential and complex process in the natural world, decay involves breakdown of organic...

Michael Sendivogius (1566 - 1636) is a Polish savant of alchemy, medicine and chemistry. He designs mines and furnaces, travels widely...

Ethyl alcohol, or ethanol, is the primary ingredient in alcoholic beverages. A clear, colorless liquid, it has a chemical formula of...