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Edith Ellen Humphrey (1875 - 1977) was a British chemist, pioneer of co-ordination chemistry.

Humphrey studied chemistry at Bedford College, where she got her B.Sc. degree, in 1897. Afterwards, she started a Ph.D. at the University of Zurich, with Alfred Werner, becoming her personal assistant, even before presenting her PhD thesis, in 1901.

During her time in Switzerland, Humphrey became the first person to synthesize a chiral octahedral cobalt complex, the cis-bis(ethylenediamine)dinitrocobalt(III) bromide.

After completing her Ph. D., Humphrey returned to England. There she worked as a research chemist in Arthur Sanderson & Sons, a factory that produced fabrics and wallpapers.

Alongside other scientists, Humphrey signed the 1904 petition for women to get admitted to the Chemical Society, and a similar letter in 1909 to Chemical News.

In 1991, the Swiss Committee on Chemistry donated Humphrey's chiral crystals to the Royal Society of Chemistry, and they are now at Burlington House, in London.