SHEET /m/phenobarbital · PubChem CID 4763 · CAS 50-06-6 · REV 2026.07
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Phenobarbital
from sourceC12H12N2O3 · 232.23 g/mol
phenylethylbarbiturate · luminal · phenobarbituric acid · phenobarbitone
What is Phenobarbital?
The oldest anticonvulsant still in wide use, more than a century old, and still on the WHO essential medicines list for seizures. from source
CategoryPrescription medicine
Fig. 1 · 2D structure RDKit
SMILES
CCC1(C(=O)NC(=O)NC1=O)C2=CC=CC=C2Where you'll find it
Dispensed on prescription, not sold on a shelf. See the rest of the prescription medicine group.
Relative acute toxicity from source
Animal study data · LD50
- Reported LD50
- 660 mg/kg · low toxicity
- Species
- rat
- Route
- oral
An LD50 describes acute toxicity under experimental conditions and is not a safe or dangerous dose for a person.
Toxicity & hazards
Toxicity · LD50
660 mg/kg · low toxicity · LD50 rat oral from source
2 more reported values
- 151 mg/kgLD50 · other · rat
- 200 mg/kgLD50 · other · rat
DangerToxicIrritantHealth hazardH301, H317, H336, H340, H350, H351, H360, H361, H372, H373from source
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Where Phenobarbital leads
Relatedcomputed