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SHEET /m/guaifenesin · PubChem CID 3516 · CAS 93-14-1 · REV 2026.07

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Guaifenesin

from source

C10H14O4 · 198.22 g/mol

glyceryl guaiacolate · Hustosil · Aeronesin · Calmipan

Also sold as Mucinex from source

What is Guaifenesin?

The expectorant in Mucinex and many cough syrups, taken to loosen chest congestion. Guaifenesin (C10H14O4, 198 g/mol) is an over-the-counter medicine sold over the counter. from source

CategoryOTC medicine
Chemical familyAlcoholsAromaticsEthers
LeaderboardsBiggest

Fig. 1 · 2D structure RDKit

SMILESCOC1=CC=CC=C1OCC(CO)O

Where you'll find it

Sold over the counter, without a prescription. Sold as Mucinex. See the rest of the otc medicine group.

Toxicity & hazards

WarningIrritantH302from source

Keep roaming

Where Guaifenesin leads

Relatedcomputed
Methocarbamol64% similarBoth carry an alcohol and an ether group.Carvedilol44% similarBoth carry an alcohol and an ether group.Propranolol41% similarBoth carry an alcohol and an ether group.Guaiacol41% similarBoth carry an ether group.

Sources & methodology

PubChem CID
3516
Wikidata
Q420682
Structure
PubChem → RDKit
Similar molecules
MoleculeFinder fingerprint similarity
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