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The origin of the word Lai Ning can be traced back to the middle of19th century. At that time, the German physicist, astronomer and mathematician John Gustav alphonse Brock discovered a special chemical substance-Lai Ning acid when studying telegraph communication. This acid has strong reducibility and can quickly reduce hydroiodic acid into iodide. At that time, this chemical was widely used in electroplating and dyeing industries.

Later, in a paper published in 1876, John Gustav Ewad Brook, the discoverer of Lai Ning acid, first disclosed the chemical structure of Lai Ning acid. The title of this paper is "On the Chemical Composition of Acids Known as Lei Ning Acids". In this paper, Brooke described the chemical structure of laninic acid in detail and put forward the name "laninic acid" for the first time.

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With the continuous development of science and technology, Lai Ning acid is widely used in chemical industry. At the beginning of the 20th century, laninic acid has become one of the indispensable chemicals in the chemical industry. Lai Ning acid exists in electroplating, photography, metallurgy, pharmacy, dyes, pigments, paints, colloids, glass, spices, reagents, electronics, food and other fields.

In Marburg, Germany, the hometown of John Gustav Eward Brooke, the discoverer of Lai Ning acid, a street named Ledinger Street was named after him to commemorate his contribution? E) Conduct a test. The name of this street is still in use today and has become a local landmark. At the same time, the word Lai Ning has become a technical term in the field of chemistry, which is widely used to describe and discuss reducing agents, reducing reactions and reducing substances.