SHEET /m/threonine · PubChem CID 6288 · CAS 72-19-5 · REV 2026.07
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Threonine from source
C4H9NO3 · 119.12 g/mol
L-threonine · (2S,3R)-2-amino-3-hydroxybutanoic acid · Threonin · L-(-)-Threonine
amino acid
CategoryBody
Fig. 1 · 2D structure RDKit
C[C@H]([C@@H](C(=O)O)N)O
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported rat other LD50 for Threonine is 3,098 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
216.9 g
a median lethal dose scaled to 154 lb (216,860 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
3,098 mg/kg · very low toxicity · LD50 rat other from source
The dose lens above scales this to a body weight.
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