SHEET /m/furfural · PubChem CID 7362 · CAS 98-01-1 · REV 2026.07
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Furfural from source
C5H4O2 · 96.08 g/mol
2-Furaldehyde · furan-2-carbaldehyde · 2-Furancarboxaldehyde · Furaldehyde
chemical compound
CategoryFood & flavor
Fig. 1 · 2D structure RDKit
C1=COC(=C1)C=O
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported rat oral LD50 for Furfural is 127 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
8.9 g
a median lethal dose scaled to 154 lb (8,890 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
127 mg/kg · moderately toxic · LD50 rat oral from source
The dose lens above scales this to a body weight.
1 more reported value
- 950 mg/kgLD50 · oral · dog
DangerFlammableToxicIrritantHealth hazardH226, H301, H311, H312, H315, H319, H330, H331, H335, H351, H370, H372, H373, H402, H412from source