SHEET /m/chlorhexidine · PubChem CID 9552079 · CAS 55-56-1 · REV 2026.07
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Chlorhexidine from source
C22H30Cl2N10 · 505.4 g/mol
Hexadol · Soretol · Fimeil · Sterilon
chemical compound
CategoryEveryday chemistry
Fig. 1 · 2D structure RDKit
C1=CC(=CC=C1N/C(=N/C(=NCCCCCCN=C(/N=C(/NC2=CC=C(C=C2)Cl)\N)N)N)/N)Cl
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 Chlorhexidine is 5,000 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
350.0 g
a median lethal dose scaled to 154 lb (350,000 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
5,000 mg/kg · very low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
1 more reported value
- 2,000 mg/kgLD50 · dermal · rabbit
DangerCorrosiveIrritantHealth hazardEnvironmentalH302, H315, H317, H318, H319, H334, H335, H373, H400, H410from source