Is PFNA (Perfluorononanoic acid) safe for babies and kids?
High risk for kidsInfants accumulate PFNA (Perfluorononanoic acid) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.
What is pfna (perfluorononanoic acid)?
The IUPAC name is 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononanoic acid.
Also known as: 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononanoic acid, Perfluorononanoic acid, heptadecafluorononanoic acid, PFNA.
- IUPAC name
- 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononanoic acid
- CAS number
- 375-95-1
- Molecular formula
- C9HF17O2
- Molecular weight
- 464.08 g/mol
- SMILES
- C(=O)(C(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)O
- PubChem CID
- 67821
Risk for babies
High riskInfants accumulate PFNA (Perfluorononanoic acid) 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
High riskMaternal PFNA exposure during pregnancy has well-documented adverse developmental effects. PFNA crosses the placenta and is detectable in umbilical cord blood at concentrations approximately 50–70% of maternal serum levels. Developmental effects associated with maternal PFNA exposure include: reduced birth weight (consistent across multiple birth cohort studies), preterm birth (modest association), altered fetal thyroid hormone levels (critical for fetal brain development), and altered fetal immune system development (reduced NK cells, altered T-cell subsets). PFNA also transfers into breast milk, providing a second postnatal developmental exposure window. Pregnancy increases urinary PFNA excretion — serum levels decline during pregnancy and lactation as PFNA is transferred to the fetus and neonate. The developing fetus and neonate are especially vulnerable because thyroid hormones are essential for neurodevelopment and immune programming. Pregnant women living near PFAS-contaminated water supplies represent the highest-risk group, and many states have established lower health advisory levels for pregnant women and children than the federal MCL.
Regulatory consensus
4 regulatory and scientific bodies have classified PFNA (Perfluorononanoic acid). The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| IARC | 2023 | Group 1 | IARC Group 1 classification for PFNA as part of the 2023 PFAS evaluation (Monograph 135). PFNA is a nine-carbon perfluorocarboxylic acid (C9 PFCA) that shares structural and mechanistic properties with PFOA (Group 1). Evidence reviewed by the Working Group included epidemiological studies associating PFNA exposure with kidney cancer, thyroid cancer, and testicular cancer, alongside mechanistic evidence for carcinogenicity including PPAR activation, immune suppression (thymic atrophy), and hormonal disruption. PFNA is persistent, bioaccumulative, and detected worldwide in human serum, breast milk, and umbilical cord blood. EPA established an individual MCL of 10 ppt (ng/L) for PFNA in drinking water under the April 2024 National Primary Drinking Water Regulation for PFAS. |
| EPA CTX / Genetox | — | Genotoxicity: negative (Ames: negative, 0 positive / 2 negative reports) | |
| EPA CTX / Genetox | — | Genotoxicity: negative (Ames: negative, 0 positive / 2 negative reports) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Eye Dam. 1 (score: very 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 pfna (perfluorononanoic acid)
- 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 PFNA (Perfluorononanoic acid):
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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 pfna (perfluorononanoic acid) safe for kids?
Infants accumulate PFNA (Perfluorononanoic acid) 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 pfna (perfluorononanoic acid)?
PFNA (Perfluorononanoic acid) 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 pfna (perfluorononanoic acid)?
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 pfna (perfluorononanoic acid)?
PFNA (Perfluorononanoic acid) has been classified by 4 agencies including IARC, EPA CTX / Genetox, EPA CTX / Genetox, 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 PFNA (Perfluorononanoic acid) in the baby app
Look up products containing pfna (perfluorononanoic acid), compare to alternatives, and explore the full data record.
Open in baby View raw API dataSources (2)
- IARC Monographs Volume 135: Perfluorooctanoic Acid and Its Salts and Other Per- and Polyfluoroalkyl Substances — PFNA, PFHxS, PFUnDA, PFDA Group 1 Classifications (2023) (2023) — regulatory
- US EPA: National Primary Drinking Water Regulations for PFAS (April 2024 Final Rule) — Individual MCLs for PFOA (4 ppt), PFOS (4 ppt), PFNA (10 ppt), PFHxS (10 ppt), HFPO-DA (10 ppt); Hazard Index for Mixtures (2024) — 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 →