Is Hexavalent chromium (Cr(VI)) safe for babies and kids?
Elevated risk for kidsInfants are extremely vulnerable to Hexavalent chromium (Cr(VI)) 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 hexavalent chromium (cr(vi))?
The IUPAC name is chromium(6+).
Also known as: chromium(6+), Chromium hexavalent ion, Chromium(6+) ion, Cr(VI).
- IUPAC name
- chromium(6+)
- CAS number
- 18540-29-9
- Molecular formula
- Cr+6
- Molecular weight
- 51.996 g/mol
- SMILES
- [Cr+6]
- PubChem CID
- 29131
Risk for babies
Elevated riskInfants are extremely vulnerable to Hexavalent chromium (Cr(VI)) 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
High riskPregnancy increases vulnerability to Hexavalent chromium (Cr(VI)). 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
10 regulatory and scientific bodies have classified Hexavalent chromium (Cr(VI)). The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| EPA CTX / NIOSH | — | potential occupational carcinogen | |
| EPA CTX / IRIS | — | D (Not classifiable as to human carcinogenicity) | |
| EPA CTX / IRIS | — | Known/likely human carcinogen | |
| EPA CTX / IRIS | — | Carcinogenic potential cannot be determined | |
| EPA CTX / IRIS | — | A (Human carcinogen) | |
| EPA CTX / NTP RoC | — | Known Human Carcinogen | |
| EPA CTX / IARC | — | Group 1 - Carcinogenic to humans | |
| EPA CTX / Health Canada | — | Group I: CEPA (carcinogenic to humans) | |
| EPA CTX / EPA OPP | — | Group A Human Carcinogen by Inhalation | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Sh (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 hexavalent chromium (cr(vi))
- Contaminated Water — Mining site runoff, Industrial discharge areas, Drinking water from old infrastructure
- Soil Contamination — Industrial sites, Smelter areas, Battery recycling facilities
- Food Chain — Fish from contaminated waters, Shellfish from polluted areas, Crops grown in contaminated soil
Safer alternatives
Lower-risk approaches that achieve a similar outcome to Hexavalent chromium (Cr(VI)):
-
Process controls to minimize degradant formation
Trade-offs: Additional manufacturing costRelative cost: 1.2-2×
Frequently asked questions
Is hexavalent chromium (cr(vi)) safe for kids?
Infants are extremely vulnerable to Hexavalent chromium (Cr(VI)) 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 hexavalent chromium (cr(vi))?
Hexavalent chromium (Cr(VI)) appears in: Mining site runoff (Contaminated water); Industrial discharge areas (Contaminated water); Industrial sites (Soil contamination); Smelter areas (Soil contamination); Fish from contaminated waters (Food chain).
What should I do if my child is exposed to hexavalent chromium (cr(vi))?
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 hexavalent chromium (cr(vi))?
Hexavalent chromium (Cr(VI)) has been classified by 10 agencies including EPA CTX / NIOSH, EPA CTX / IRIS, EPA CTX / IRIS, EPA CTX / IRIS, EPA CTX / IRIS, 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 Hexavalent chromium (Cr(VI)) in the baby app
Look up products containing hexavalent chromium (cr(vi)), compare to alternatives, and explore the full data record.
Open in baby View raw API dataSources (2)
- IARC Monographs Volume 100C: Arsenic, Metals, Fibres and Dusts — Chromium (VI) Compounds Group 1 (Lung Cancer, Nasal/Sinus Cancer), Nickel Compounds Group 1, Beryllium Group 1 (2012) (2012) — regulatory
- US EPA: National Primary Drinking Water Regulations — Inorganic Chemicals (40 CFR 141.62); Total Chromium MCL 100 μg/L, Barium MCL 2 mg/L, Uranium MCL 30 μg/L, Selenium MCL 50 μg/L, Manganese SMCL 50 μg/L (1992) — 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 →