Karl Friedrich August Rammelsberg (1 April 1813 – 28 December 1899) was a German mineralogist from Berlin, Prussia.

From 1850 he taught classes at the Gewerbeakademie, a vocational training academy that was a predecessor of Technische Universität Berlin.

He discovered the reducing action of hypophosphoric and phosphoric acids, and was the first scientist to determine the composition of Schlippe's salt (sodium thioantimonate).

[2] He was the first scientist other than Mendeleyev to include his Periodic Table in a book, the fourth edition (1874) of Grundriss der chemie gemäss den neueren Ansichten, published in Berlin.

[6] He died at Gross Lichterfelde, southwest of Berlin Rammelsberg was the author of a series important textbooks, such as: He is also credited with providing translations of technical publications that were written in Italian, French and Swedish.