SHEET /m/phosphoric-acid · PubChem CID 1004 · CAS 7664-38-2 · REV 2026.07
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Phosphoric acid from source
H3O4P · 97.995 g/mol
ORTHOPHOSPHORIC ACID · o-Phosphoric acid · Wc-reiniger · Acidum phosphoricum
chemical compound
CategoryFood & flavor
Fig. 1 · 2D structure RDKit
OP(=O)(O)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 Phosphoric acid is 1,530 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
107.1 g
a median lethal dose scaled to 154 lb (107,100 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
1,530 mg/kg · low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
1 more reported value
- 2,740 mg/kgLD50 · dermal · rabbit
DangerCorrosiveToxicIrritantHealth hazardH290, H302, H313, H314, H318, H331, H332, H335, H370, H402from source
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