Baby Safety / Compounds / Nano zinc oxide

Is Nano zinc oxide safe for babies and kids?

Context-dependent for kids

(Babies-specific data is limited; this page draws from human pregnant context.) Pregnancy alters the metabolism and distribution of Nano zinc oxide, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

What is nano zinc oxide?

The IUPAC name is zinc oxygen(2-).

Also known as: zinc oxygen(2-), Zincum Oxydatum, Zinc paste, Zinci Oxydum.

IUPAC name
zinc oxygen(2-)
CAS number
1314-13-2
Molecular formula
OZn
Molecular weight
81.4 g/mol
SMILES
[O-2].[Zn+2]
PubChem CID
3007857

Risk for babies

Context-dependent

Pregnancy alters the metabolism and distribution of Nano zinc oxide, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

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.

Risk for pregnant and nursing people

Context-dependent

Pregnancy alters the metabolism and distribution of Nano zinc oxide, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

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

12 regulatory and scientific bodies have classified Nano zinc oxide. The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 5 positive / 13 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 5 positive / 13 negative reports)
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)
EPA CTX / Skin-Eye—skin corrosion: in vitro / ex vivo: Ambiguous (score: not classifiable)
EPA CTX / Skin-Eye—eye irritation: in vivo: Moderate or Mild Irritation (score: moderate)
EPA CTX / Skin-Eye—eye irritation: in vivo: Studies Indicate No Significant Irritation (score: low)
EPA CTX / Skin-Eye—skin irritation: in vivo: Studies Indicate No Significant Irritation (score: low)
EPA CTX / Skin-Eye—eye irritation: in vitro / ex vivo: Studies Indicate No Significant Irritation (score: low)
EPA CTX / Skin-Eye—skin sensitisation: in vivo (non-LLNA): Ambiguous (score: not classifiable)
EPA CTX / Skin-Eye—skin sensitisation: in vivo (non-LLNA): Not likely to be sensitizing (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 nano zinc oxide

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Nano zinc oxide:

  • 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

What products contain nano zinc oxide?

Nano zinc oxide appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

Why do regulators disagree about nano zinc oxide?

Nano zinc oxide has been classified by 12 agencies including EPA CTX / Genetox, EPA CTX / Genetox, 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 Nano zinc oxide in the baby app

Look up products containing nano zinc oxide, compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. US EPA: Nanomaterial Case Studies — Nano Zinc Oxide in Sunscreen Products; Dermal Penetration Assessment; Aquatic Toxicity from Zn²⁺ Dissolution; Spray Inhalation Risk (2012) — regulatory
  2. EFSA/SCCS: Scientific Opinion on Zinc Oxide (nano) in Cosmetics — Dermal Safety Assessment, Intact Skin Penetration, ZnO Fume Fever, Inhalation Concern for Spray Products (2016) — regulatory

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 →