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SHEET /m/geosmin · PubChem CID 29746 · CAS 19700-21-1 · REV 2026.07

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Geosmin from source

C12H22O · 182.3 g/mol

(-)-geosmin · FEMA NO. 4682 · trans-1,10-dimethyl-trans-decalol · 4a(2H)-Naphthalenol, octahydro-4,8a-dimethyl-, [4S-(4.alpha.,4a.alpha.,8a.beta.)]-

chemical compound responsible for the characteristic odour of earth

Chemical familyAlcohols

Fig. 1 · 2D structure RDKit

C[C@H]1CCC[C@@]2([C@@]1(CCCC2)O)C

Where you'll find it

Not yet mapped to everyday foods or products.

Toxicity & hazards

WarningIrritantH302from source

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Where Geosmin leads