SHEET /m/trimethylamine · PubChem CID 1146 · CAS 75-50-3 · REV 2026.07
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Trimethylamine
from sourceC3H9N · 59.11 g/mol
TMA · tridimethylaminomethane · dimethylmethaneamine
What is Trimethylamine?
The smell of rotting fish, of a fishing dock, and of some vaginal infections. People with the rare trimethylaminuria cannot break it down. from source
CategoryScent & aroma
Fig. 1 · 2D structure RDKit
SMILES
CN(C)CThe dose makes the poison inferred
A reported rat oral LD50 for Trimethylamine is 500 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
35.0 g
a median lethal dose scaled to 154 lb (35,000 mg)
“The dose makes the poison” is a cross-species estimate shown as neutral science, not a threshold anyone should act on. Real toxicity depends on the person, not body mass alone.
Toxicity & hazards
Toxicity · LD50
500 mg/kg · low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
DangerFlammableCompressed gasCorrosiveIrritantHealth hazardH220, H224, H280, H302, H314, H315, H318, H320, H332, H335, H371, H372, H373, H402from source