Carl Remigius Fresenius (28 December 1818 – 11 June 1897), was a German chemist, known for his studies in analytical chemistry.

[1] In 1845, he was appointed to the chair of chemistry, physics and technology at the Wiesbaden Agricultural Institution, and three years later, he became the first director of the chemical laboratory which he induced the Nassau government to establish at that place.

[1] Apart from his administrative duties, Fresenius occupied himself almost exclusively with analytical chemistry, and the fullness and accuracy of his textbooks on that subject (of which that on qualitative analysis first appeared in 1841 and that on quantitative in 1846) soon rendered them standard works.

Many of Fresenius's original papers were published in the Zeitschrift für analytische Chemie, which he founded in 1862 and continued to edit until his death.

Another son, Theodor Wilhelm Fresenius (1856–1936),[2] was educated at Strasbourg and occupied various positions in the Wiesbaden laboratory.