What prize did Mendeleev's textbook Organic Chemistry win?

Mendeleev’s textbook Organic Chemistry won the Demidov Prize.

Mendeleev published Organic Chemistry in 1861, shortly after returning to Saint Petersburg from his research period in Heidelberg. The book was written as a teaching text and aimed to organize the rapidly growing body of knowledge about organic compounds.

The Demidov Prize was one of the Russian Empire’s leading scientific and scholarly honors. It was associated with the Demidov family and was awarded through the St. Petersburg Academy of Sciences for notable work in fields including science, history, and literature. Mendeleev received the chemistry award for his textbook; sources often give 1862 as the award year.

This prize should not be confused with the Nobel Prize, which Mendeleev never received, or with the much later Lomonosov Prize. The recognition helped strengthen his reputation before his landmark work on the periodic law later in the 1860s.