Is 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) safe for babies and kids?
High risk for kidsInfants accumulate 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.
What is 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin)?
The IUPAC name is 1,2,3,7,8-pentachlorodibenzo-p-dioxin.
Also known as: 1,2,3,7,8-pentachlorodibenzo-p-dioxin, 1,2,3,7,8-Pentachlorodibenzodioxin, 1,2,3,7,8-PeCDD, PCDD 54.
- IUPAC name
- 1,2,3,7,8-pentachlorodibenzo-p-dioxin
- CAS number
- 40321-76-4
- Molecular formula
- C12H3Cl5O2
- Molecular weight
- 356.4 g/mol
- SMILES
- C1=C2C(=CC(=C1Cl)Cl)OC3=C(C(=C(C=C3O2)Cl)Cl)Cl
- PubChem CID
- 38439
Risk for babies
High riskInfants accumulate 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.
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
Very high risk1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) persists in maternal adipose tissue and is mobilized during pregnancy and lactation. Lipophilic pollutants concentrate in breast milk and cross the placenta during critical developmental windows.
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
4 regulatory and scientific bodies have classified 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin). The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| IARC | 1997 | Group 3 (not classifiable as to carcinogenicity) | Reflects inadequate evidence in both humans and animals specific to this congener; assessed within dioxin TEF framework |
| WHO | — | Toxic Equivalency Factor (TEF = 1.0) | Highest TEF of any dioxin congener other than TCDD; reflects structural similarity in lateral chlorine substitution pattern at positions 2,3,7,8 |
| EU | — | Included in sum PCDD/F-TEQ maximum levels | Regulated under EU Regulation 1259/2011 alongside TCDD |
| EFSA | — | Assessed against Tolerable Weekly Intake (TWI) of 2 pg WHO-TEQ/kg bw/week | Dietary exposure assessed as part of total dietary TEQ intake |
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 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin)
- 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 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin):
-
Exposure reduction (environmental contaminant)
Trade-offs: Removes 95-99% of dissolved contaminants including metals, PFAS, nitrates; wastes 2-4 gallons per gallon produced (improving with newer systems); removes beneficial minerals; $0.05-0.25/gallon; requires pre-treatment for longevity.Relative cost: 1.2-2×
Frequently asked questions
Is 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin) safe for kids?
Infants accumulate 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.
What products contain 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin)?
1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) 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 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin)?
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 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin)?
1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) has been classified by 4 agencies including IARC, WHO, EU, EFSA, 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 1,2,3,7,8-PeCDD (1,2,3,7,8-Pentachlorodibenzo-p-dioxin) in the baby app
Look up products containing 1,2,3,7,8-pecdd (1,2,3,7,8-pentachlorodibenzo-p-dioxin), compare to alternatives, and explore the full data record.
Open in baby View raw API dataSources (2)
- IARC Monographs Volume 69: Polychlorinated Dibenzo-para-dioxins and Polychlorinated Dibenzofurans — TCDD Group 1; other PCDD/PCDF congeners Group 3 (1997); TCDD classification reaffirmed in IARC Volume 100F (2012) (1997) — regulatory
- EFSA Panel on Contaminants in the Food Chain (CONTAM): Risk for Animal and Human Health Related to the Presence of Dioxins and Dioxin-Like PCBs in Feed and Food — TWI 2 pg WHO-TEQ/kg bw/week; TEF framework (WHO 2005); fatty fish, dairy, meat as primary exposure matrices (2018) (2018) — 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 →