SHEET /m/methanethiol · PubChem CID 878 · CAS 74-93-1 · REV 2026.07
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Methanethiol from source
CH4S · 48.11 g/mol
METHYL MERCAPTAN · Methylmercaptan · Mercaptomethane · Thiomethanol
chemical compound
CategoryScent & aroma
Fig. 1 · 2D structure RDKit
CS
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported mouse oral LD50 for Methanethiol is 61 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
4.3 g
a median lethal dose scaled to 154 lb (4,270 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
61 mg/kg · moderately toxic · LD50 mouse oral from source
The dose lens above scales this to a body weight.
DangerFlammableCompressed gasToxicIrritantHealth hazardEnvironmentalH220, H280, H315, H319, H331, H336, H370, H372, H400, H410from source
Keep roaming
Where Methanethiol leads
Found infrom source