27 February] 1894) was a Baltic German chemist from the Livonia Governorate, Russian Empire.

Schmidt received his PhD in 1844 from the University of Giessen under Justus von Liebig.

In 1845, he first announced the presence in the test of some Ascidians of what he called "tunicine", a substance very similar to cellulose.

Schmidt is notable as the PhD advisor of the Nobel Prize winner Wilhelm Ostwald.

He showed that animal and plant cell constituents are chemically similar and studied reactions of calcium albuminates.