Baby Safety / Compounds / Carbon monoxide

Is Carbon monoxide safe for babies and kids?

Very high risk for kids

Infants are more vulnerable to Carbon monoxide than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What is carbon monoxide?

Also known as: carbon monooxide, Carbonic oxide, Carbon oxide (CO), carbon(II) oxide.

IUPAC name
carbon monoxide
CAS number
630-08-0
Molecular formula
CO
Molecular weight
28.01 g/mol
SMILES
[C-]#[O+]
PubChem CID
281

Risk for babies

Very high risk

Infants are more vulnerable to Carbon monoxide than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

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

Severe risk

CO is fetotoxic at maternal COHb levels that cause minimal symptoms in the mother. Fetal hemoglobin has 10–15% higher CO affinity than adult hemoglobin; fetal COHb can exceed maternal COHb by 10–15%. CO exposure during pregnancy is associated with stillbirth, fetal death, low birth weight, and neonatal brain injury. CDC reports that CO poisoning disproportionately injures pregnant women; even subclinical maternal exposure may cause fetal harm. Extended O₂ therapy and hyperbaric O₂ are recommended even for mild maternal poisoning.

Regulatory consensus

4 regulatory and scientific bodies have classified Carbon monoxide. The classifications differ — that's the data.

AgencyYearClassificationNotes
OSHA—Occupational exposure limit
EPA CTX / Skin-Eye—Eye Irritation: Not classified (score: low)
EPA CTX / Skin-Eye—Skin Irritation: Not classified (score: low)
EPA CTX / Skin-Eye—Skin Sensitization: Not classified (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 carbon monoxide

  • Outdoor Air — Vehicle exhaust, Industrial emissions, Power plant discharge
  • Indoor Air — Combustion byproducts, Office buildings, Parking garages

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Carbon monoxide:

  • Process redesign to avoid hazardous intermediates
    Trade-offs: May require significant R&D investment. Not always feasible.
    Relative cost: 1.2-2×

Frequently asked questions

Is carbon monoxide safe for kids?

Infants are more vulnerable to Carbon monoxide than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What products contain carbon monoxide?

Carbon monoxide appears in: Vehicle exhaust (Outdoor air); Industrial emissions (Outdoor air); Combustion byproducts (Indoor air); Office buildings (Indoor air).

What should I do if my child is exposed to carbon monoxide?

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 carbon monoxide?

Carbon monoxide has been classified by 4 agencies including OSHA, EPA CTX / Skin-Eye, EPA CTX / Skin-Eye, 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 Carbon monoxide in the baby app

Look up products containing carbon monoxide, compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (4)
  1. CDC: Carbon Monoxide Poisoning — Facts and Prevention (2023) — report
  2. ATSDR Toxicological Profile for Carbon Monoxide (2012) — report
  3. US EPA National Ambient Air Quality Standards for Carbon Monoxide (2011) — regulatory
  4. ASPCA Animal Poison Control Center: Carbon Monoxide Toxicosis in Companion Animals (2019) — report

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 →