SHEET /m/propylene-glycol · PubChem CID 1030 · CAS 57-55-6 · REV 2026.07
Propylene glycol
from sourceC3H8O2 · 76.09 g/mol
methyl ethyl glycol · MEG · methylethylene glycol · PG
What is Propylene glycol?
The carrier liquid in vape juice, fog machines, and many liquid medicines. It holds water, so it keeps things moist without being sweet. Found in processed snacks. from source
Fig. 1 · 2D structure RDKit
CC(CO)OWhere you'll find it
Curated by MoleculeFinder from source
The dose makes the poison inferred
A reported rat oral LD50 for Propylene glycol is 22,000 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
“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
22,000 mg/kg · very low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
2 more reported values
- 6,423 mg/kgLD50 · iv · rat
- 6,660 mg/kgLD50 · other · rat
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