Baby Safety / Compounds / Propylene glycol

Is Propylene glycol safe for babies and kids?

Moderate risk for kids

Infants may be exposed to Propylene glycol through residual monomer migration from food-contact plastics, bottles, and packaging. Immature hepatic conjugation and renal clearance prolong internal exposure.

What is propylene glycol?

The IUPAC name is propane-1,2-diol.

Also known as: propane-1,2-diol, 1,2-propanediol, 1,2-Propylene glycol, 1,2-dihydroxypropane.

IUPAC name
propane-1,2-diol
CAS number
57-55-6
Molecular formula
C3H8O2
Molecular weight
76.09 g/mol
SMILES
CC(CO)O
PubChem CID
1030

Risk for babies

Moderate risk

Infants may be exposed to Propylene glycol through residual monomer migration from food-contact plastics, bottles, and packaging. Immature hepatic conjugation and renal clearance prolong internal exposure.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Context-dependent

Prenatal exposure to residual Propylene glycol from food-contact materials is a concern due to potential developmental toxicity. Monomers may leach from plastics at elevated temperatures.

No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

3 regulatory and scientific bodies have classified Propylene glycol. The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 9 positive / 4 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 9 positive / 4 negative reports)
EPA CTX / Skin-Eye—skin irritation: in vivo: Studies Indicate No Significant Irritation (score: low)

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where kids encounter propylene glycol

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles
  • Fragrance — perfume, cologne, scented personal care products, household fragrance products, candles
    Identified in Fragrance Ingredient Safety Priority Research database (2,325 ingredients)

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Propylene glycol:

  • Physical/mechanical pest control (IPM)
    Trade-offs: More labor-intensive. May not be sufficient for severe infestations.
    Relative cost: 1.2-2×

Frequently asked questions

Is propylene glycol safe for kids?

Infants may be exposed to Propylene glycol through residual monomer migration from food-contact plastics, bottles, and packaging. Immature hepatic conjugation and renal clearance prolong internal exposure.

What products contain propylene glycol?

Propylene glycol appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments); perfume (Fragrance).

What should I do if my child is exposed to propylene glycol?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Why do regulators disagree about propylene glycol?

Propylene glycol has been classified by 3 agencies including EPA CTX / Genetox, EPA CTX / Genetox, EPA CTX / Skin-Eye, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See Propylene glycol in the baby app

Look up products containing propylene glycol, compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. US FDA: Propylene Glycol in Animal Food — Final Rule Prohibiting Use in Cat Food (21 CFR 582.4666) and GRAS Status for Dog Food (1996) — regulatory
  2. ASPCA Animal Poison Control Center: Propylene Glycol — Heinz Body Anemia Risk in Cats and Species Differences in Erythrocyte Sensitivity (2022) — veterinary

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →