SHEET /m/sodium-sulfite · PubChem CID 24437 · CAS 7757-83-7 · REV 2026.07
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Sodium sulfite from source
Na2O3S · 126.05 g/mol
Disodium sulfite · Sodium sulfite anhydrous · Sodium sulphite · Sulfurous acid, disodium salt
chemical compound
CategoryFood & flavor
Fig. 1 · 2D structure RDKit
[O-]S(=O)[O-].[Na+].[Na+]
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported rabbit iv LD50 for Sodium sulfite is 65 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
4.5 g
a median lethal dose scaled to 154 lb (4,550 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
65 mg/kg · moderately toxic · LD50 rabbit iv from source
The dose lens above scales this to a body weight.
3 more reported values
- 115 mg/kgLD50 · iv · rat
- 130 mg/kgLD50 · iv · mouse
- 950 mg/kgLD50 · other · mouse
DangerCorrosiveIrritantH302, H314, H315, H318, H319from source
Keep roaming
Where Sodium sulfite leads
Relatedcomputed