Karl David Reinhold Myrbäck, (7 September 1900 – 1 July 1986),[1] was a Swedish chemist.
Myrbäck graduated with a Ph.D. degree in 1927 from Stockholms högskola with a thesis on enzyme chemistry.
He was elected to both the Royal Swedish Academy of Sciences and the Royal Swedish Academy of Engineering Sciences in 1943, and acted subsequently as Deputy Secretary of the Royal Swedish Academy of Engineering Sciences.
Myrbäck became editor-in-chief of the scientific journal Acta Chemica Scandinavica in 1947.
In 1927, he married Signe Karlsson (1900–1983), daughter of restaurant keeper Alfred Karlsson and Hilda, née Wester.