Is 1,4-Dioxane safe for babies and kids?
Moderate risk for kidsInfants are vulnerable to 1,4-Dioxane through inhalation of volatile residues in household products. Immature blood-brain barrier and higher respiratory rate per body weight amplify CNS exposure.
What is 1,4-dioxane?
Also known as: Dioxane, p-Dioxane, Diethylene ether, 1,4-Diethylene dioxide.
- IUPAC name
- 1,4-dioxane
- CAS number
- 123-91-1
- Molecular formula
- C4H8O2
- Molecular weight
- 88.11 g/mol
- SMILES
- C1COCCO1
- PubChem CID
- 31275
Risk for babies
Moderate riskInfants are vulnerable to 1,4-Dioxane through inhalation of volatile residues in household products. Immature blood-brain barrier and higher respiratory rate per body weight amplify CNS 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.
Risk for pregnant and nursing people
Context-dependentOccupational and household exposure to 1,4-Dioxane during pregnancy is associated with developmental toxicity. Solvents readily cross the placenta and can cause fetal growth restriction.
No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.
Regulatory consensus
17 regulatory and scientific bodies have classified 1,4-Dioxane. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| IARC | 1999 | Group 2B (possibly carcinogenic to humans) | IARC Monograph 71 (1999). 1,4-Dioxane classified Group 2B based on sufficient evidence of carcinogenicity in animals (hepatocellular carcinomas in rats and mice at high doses in drinking water studies) and inadequate evidence in humans. 1,4-Dioxane is a cyclic ether that is not intentionally added to products — it is a process contaminant formed during ethoxylation reactions (manufacture of polyethylene glycol surfactants, ethoxylated alcohols used in shampoos, body washes, and cleansers). Detection in consumer products reflects incomplete purification during manufacturing. The 2B classification does not reflect the contamination context but applies to 1,4-dioxane as a pure compound regardless of source. |
| US EPA | 2013 | Likely carcinogenic to humans (Group B2 under older IRIS guidelines) | US EPA IRIS: 1,4-Dioxane classified as 'likely to be carcinogenic to humans' based on animal evidence. EPA has established drinking water health advisory of 35 μg/L (35 ppb) for 1,4-dioxane (a 1-in-100,000 cancer risk level). 1,4-Dioxane is a persistent groundwater contaminant — it does not adsorb to soil, does not biodegrade readily, and travels ahead of chlorinated solvent plumes from industrial sites. Multiple Superfund sites have 1,4-dioxane contamination. The EPA has proposed a Maximum Contaminant Level (MCL) for 1,4-dioxane in drinking water under the PFAS/emerging contaminants regulatory action; as of 2024, no federal MCL has been finalized but several states (New York: 1 ppb; New Hampshire: 3 ppb; Massachusetts: 0.3 ppb) have set their own standards. |
| EPA CTX / NIOSH | — | potential occupational carcinogen | |
| EPA CTX / IRIS | — | Likely to be carcinogenic to humans | |
| EPA CTX / NTP RoC | — | Reasonably Anticipated to be a Human Carcinogen | |
| EPA CTX / IARC | — | Group 2B - Possibly carcinogenic to humans | |
| EPA CTX / CalEPA | — | Known human carcinogen | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: negative, 3 positive / 10 negative reports) | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: negative, 3 positive / 10 negative reports) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Eye Irrit. 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Serious eye damage/eye irritation - Category 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 2A (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Category 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Eye Irrit. 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 6.4A (Category 2A) (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Category 6.3B (Category 3) (score: moderate) | |
| 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 1,4-dioxane
- 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 1,4-Dioxane:
-
Fragrance-free formulations
Trade-offs: Consumer preference for scented productsRelative cost: Lower (ingredient elimination)
-
Essential oil-based fragrances (with disclosure)
Trade-offs: Natural does not mean safe — many essential oils are skin sensitizersRelative cost: 2-5× conventional
Frequently asked questions
Is 1,4-dioxane safe for kids?
Infants are vulnerable to 1,4-Dioxane through inhalation of volatile residues in household products. Immature blood-brain barrier and higher respiratory rate per body weight amplify CNS exposure.
What products contain 1,4-dioxane?
1,4-Dioxane 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 1,4-dioxane?
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 1,4-dioxane?
1,4-Dioxane has been classified by 17 agencies including IARC, US EPA, EPA CTX / NIOSH, EPA CTX / IRIS, EPA CTX / NTP RoC, 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 1,4-Dioxane in the baby app
Look up products containing 1,4-dioxane, compare to alternatives, and explore the full data record.
Open in baby View raw API dataSources (2)
- IARC Monographs Volume 71: Re-evaluation of Some Organic Chemicals, Hydrazine and Hydrogen Peroxide — 1,4-Dioxane Group 2B Evaluation (1999) — regulatory
- US EPA IRIS: 1,4-Dioxane — Toxicological Review and Integrated Risk Information (Likely Carcinogen, Drinking Water Health Advisory 35 μg/L) (2013) — 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 →