Baby Safety / Compounds / PFNA (Perfluorononanoic acid)

Is PFNA (Perfluorononanoic acid) safe for babies and kids?

High risk for kids

Not medical or professional safety advice, and not a substitute for a qualified clinician — consult one. Full disclaimer →

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 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 risk

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.

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.

What to do: 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.

Risk for pregnant and nursing people

High risk

Maternal 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.

AgencyYearClassificationNotes
IARC2023Not evaluated by IARC
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):

  • 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 data

Sources (6)
  1. IARC Monographs Volume 135 (2023): Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) — PFOA classified Group 1 (carcinogenic to humans); PFOS Group 2B. NOTE: this PFAS was NOT among the agents individually evaluated in Volume 135. (2023) — regulatory
  2. 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
  3. ATSDR Toxicological Profile for Perfluoroalkyls (PFAS class — covers PFNA C9 perfluorocarboxylate) (2021) — regulatory
  4. EPA PFAS Strategic Roadmap — PFNA Risk-Management Framework + Hazard Index in 2024 NPDWR (2021) — regulatory
  5. Stockholm Convention on Persistent Organic Pollutants — Long-Chain PFCA class (PFNA included via long-chain framework) (2019) — regulatory
  6. NIOSH PFAS Occupational Exposure Framework Supplementary (2022) — regulatory

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for medical, pediatric, legal, or regulatory advice. Why we built ALETHEIA →