Hugo Wilhelm Traugott Erdmann (8 May 1862 – 25 June 1910) was the German chemist who discovered, together with his doctoral advisor Jacob Volhard, the Volhard-Erdmann cyclization.

In 1898 he was the first who coined the term noble gas (the original noun is Edelgas in German).

[1] Erdmann invented the name Thiozone in 1908, hypothesizing that S3 made up a large proportion of liquid sulfur.

[2] In collaboration with Rudolph Fittig, Erdmann found that dehydration of γ-phenyl structural analog of isocrotonic acid produced α-naphthol, an observation that provided evidence in understanding the nature of naphthalene.

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