Is Cobalt safe for babies and kids?
Severe risk for kidsInfants are extremely vulnerable to Cobalt due to immature blood-brain barrier, higher gastrointestinal absorption rates (40-50% vs 3-10% in adults), and rapidly developing neurology. Even trace exposure can cause irreversible neurodevelopmental harm.
What is cobalt?
Also known as: Cobalt, elemental, Cobalt-59, Aquacat, Super cobalt.
- IUPAC name
- cobalt
- CAS number
- 7440-48-4
- Molecular formula
- Co
- Molecular weight
- 58.93319 g/mol
- SMILES
- [Co]
- PubChem CID
- 104730
Risk for babies
Severe riskInfants are extremely vulnerable to Cobalt due to immature blood-brain barrier, higher gastrointestinal absorption rates (40-50% vs 3-10% in adults), and rapidly developing neurology. Even trace exposure can cause irreversible neurodevelopmental harm.
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.
Risk for pregnant and nursing people
Severe riskPregnancy increases vulnerability to Cobalt. Heavy metals cross the placenta, accumulate in fetal tissue, and interfere with neurodevelopment. Maternal bone resorption during pregnancy mobilizes stored metals.
Known reproductive toxicant (GHS H360) or confirmed endocrine disruptor. Placental transfer is presumed. Fetal exposure during critical developmental windows may cause structural malformations, growth restriction, or functional deficits.
Regulatory consensus
15 regulatory and scientific bodies have classified Cobalt. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| IARC | 2006 | Group 2B (possibly carcinogenic to humans) | IARC Monograph 86 (2006). Cobalt metal alone: Group 2B. Cobalt metal with tungsten carbide (hard metal dusts): Group 2A. Limited evidence in humans; sufficient evidence in animals (inhalation → lung tumors). Primary occupational exposure: hard metal and diamond polishing industries. Note: soluble cobalt(II) salts also classified Group 2B separately. |
| EPA CTX / NTP RoC | — | Reasonably Anticipated to be a Human Carcinogen | |
| EPA CTX / IARC | — | Group 2A - Probably carcinogenic to humans | |
| EPA CTX / CalEPA | — | Known human carcinogen | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: positive, 1 positive / 1 negative reports) | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: positive, 1 positive / 1 negative reports) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Skin Sens. 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Sah (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Skin sensitization - Category 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Category 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Skin Sens. 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 6.4A (Category 2A) (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Category 6.5B (Category 1) (score: moderate) | |
| EPA CTX / Skin-Eye | — | skin sensitisation: in vivo (non-LLNA): High Frequency of Sensitization (score: high) | |
| EPA CTX / Skin-Eye | — | eye irritation: in vivo: Severe Irritation (score: high) |
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 cobalt
- 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 Cobalt:
-
Enzyme or biocatalysts where applicable
Trade-offs: Temperature/pH sensitivity. Higher cost for some applications.Relative cost: 2-5×
Frequently asked questions
Is cobalt safe for kids?
Infants are extremely vulnerable to Cobalt due to immature blood-brain barrier, higher gastrointestinal absorption rates (40-50% vs 3-10% in adults), and rapidly developing neurology. Even trace exposure can cause irreversible neurodevelopmental harm.
What products contain cobalt?
Cobalt appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).
What should I do if my child is exposed to cobalt?
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 cobalt?
Cobalt has been classified by 15 agencies including IARC, EPA CTX / NTP RoC, EPA CTX / IARC, EPA CTX / CalEPA, EPA CTX / Genetox, 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 Cobalt in the baby app
Look up products containing cobalt, compare to alternatives, and explore the full data record.
Open in baby View raw API dataSources (3)
- IARC Monographs Volume 86: Cobalt in Hard Metals and Cobalt Sulfate, Gallium Arsenide, Indium Phosphide and Vanadium Pentoxide (2006) — regulatory
- ATSDR Toxicological Profile for Cobalt (2004) — report
- NIOSH Hazard Review: Health Effects of Occupational Exposure to Respirable Crystalline Silica — Cobalt (2009) — 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 →