SHEET /m/4-aminobenzoic-acid · PubChem CID 978 · CAS 150-13-0 · REV 2026.07
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4-Aminobenzoic acid from source
C7H7NO2 · 137.14 g/mol
p-aminobenzoic acid · PABA · Vitamin BX · para-aminobenzoic acid
chemical compound
CategoryNutrient
Fig. 1 · 2D structure RDKit
C1=CC(=CC=C1C(=O)O)N
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported dog oral LD50 for 4-Aminobenzoic acid is 1,000 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
70.0 g
a median lethal dose scaled to 154 lb (70,000 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
1,000 mg/kg · low toxicity · LD50 dog oral from source
The dose lens above scales this to a body weight.
4 more reported values
- 1,830 mg/kgLD50 · oral · rabbit
- 2,850 mg/kgLD50 · oral · mouse
- 6,000 mg/kgLD50 · oral · rat
- 2,000 mg/kgLD50 · iv · rabbit
WarningIrritantH315, H317, H319, H335, H412from source
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